Lightning calculation and other "mathemagic" | Arthur Benjamin

1,776,678 views ใƒป 2008-01-09

TED


ืื ื ืœื—ืฅ ืคืขืžื™ื™ื ืขืœ ื”ื›ืชื•ื‘ื™ื•ืช ื‘ืื ื’ืœื™ืช ืœืžื˜ื” ื›ื“ื™ ืœื”ืคืขื™ืœ ืืช ื”ืกืจื˜ื•ืŸ.

ืžืชืจื’ื: Etai Yaffe ืžื‘ืงืจ: Amit segal
00:12
Good morning, ladies and gentlemen.
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ื•ื‘ื›ืŸ, ื‘ื•ืงืจ ื˜ื•ื‘ ื’ื‘ื™ืจื•ืชื™ื™ ื•ืจื‘ื•ืชื™
00:14
My name is Art Benjamin, and I am a "mathemagician."
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ืฉืžื™: ืืจืช (ืืจืชื•ืจ) ื‘ื ื’'ืžื™ืŸ ื•ืื ื™ ืงื•ืกื ื‘ืžืชืžื˜ื™ืงื”
00:18
What that means is, I combine my loves of math and magic
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ื”ื›ื•ื•ื ื” ื‘ื›ืš ื”ื™ื ืฉืื ื™ ืžืฉืœื‘ ืืช ืื”ื‘ืชื™ ืœืžืชืžื˜ื™ืงื” ื•ืœืงืกืžื™ื
00:21
to do something I call "mathemagics."
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ื›ื“ื™ ืœืขืฉื•ืช ื“ื‘ืจ ืื•ืชื• ืื ื™ ืžื›ื ื” "ืžืชืžื˜ื™ืงืกื"
00:24
But before I get started, I have a quick question for the audience.
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ืื‘ืœ ืœืคื ื™ ืฉืืชื—ื™ืœ, ื™ืฉ ืœื™ ืฉืืœื” ืžื”ื™ืจื” ืœืงื”ืœ
00:27
By any chance, did anyone happen
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ื”ืื ื‘ืžืงืจื”, ืžื™ืฉื”ื• ื”ื‘ื™ื ืื™ืชื•
00:29
to bring with them this morning a calculator?
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ืžื—ืฉื‘ื•ืŸ ื”ื‘ื•ืงืจ?
00:33
Seriously, if you have a calculator with you, raise your hand.
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ื‘ืจืฆื™ื ื•ืช, ืื ื™ืฉ ืœืžื™ืฉื”ื• ืžื—ืฉื‘ื•ืŸ, ืฉื™ืจื™ื ืืช ื™ื“ื•, ืฉื™ืจื™ื ืืช ื™ื“ื•
00:36
Raise your hand. Did your hand go up?
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ืื ื™.. ื”ืื ื”ืจืžืช ืืช ื™ื“ืš?
00:39
Now bring it out, bring it out. Anybody else?
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ืงื“ื™ืžื” ื”ื•ืฆื ืื•ืชื•, ื”ื•ืฆื ืื•ืชื•. ืžื™ืฉื”ื• ื ื•ืกืฃ?
00:41
I see, I see one way in the back.
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ืื ื™ ืจื•ืื”, ืื ื™ ืจื•ืื” ื’ื‘ืจืช ืื—ืช ืžืื—ื•ืจ
00:43
You sir, that's three.
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ืืชื” ืื“ื•ื ื™, ื–ื” ืฉืœื•ืฉื”
00:45
And anybody on this side here?
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ื•ื”ืื ื™ืฉ ืžื™ืฉื”ื• ื ื•ืกืฃ ื‘ืฆื“ ื”ื–ื”?
00:48
OK, over there on the aisle.
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ืืชื” ืฉื ืขืœ ืžืขื‘ืจ. ืืจื‘ืขืชื›ื ืขื ื”ืžื—ืฉื‘ื•ื ื™ื
00:49
Would the four of you please bring out your calculators,
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ื‘ื‘ืงืฉื” ื”ื•ืฆื™ืื• ืืช ื”ืžื—ืฉื‘ื•ื ื™ื ื•ื‘ื•ืื• ื”ืฆื˜ืจืคื• ืืœื™ ืขืœ ื”ื‘ืžื”
00:52
then join me up on stage.
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00:53
Let's give them a nice round of applause.
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ื‘ื•ืื• ื•ื ืงื‘ืœ ืืช ื”ืžืชื ื“ื‘ื™ื ื”ืœืœื• ื‘ืžื—ื™ืื•ืช ื›ืคื™ื™ื
00:55
(Applause)
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[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
00:58
That's right.
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ื‘ื“ื™ื•ืง ื›ืš. ืขื›ืฉื™ื•, ืžื›ื™ื•ื•ืŸ ืฉืœื ื”ื™ื™ืชื” ืœื™ ื”ื”ื–ื“ืžื ื•ืช
00:59
Now, since I haven't had the chance to work with these calculators,
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ืœืขื‘ื•ื“ ืขื ืžื—ืฉื‘ื•ื ื™ื ืืœื”, ืื ื™ ืฆืจื™ืš ืœื•ื•ื“ื
01:03
I need to make sure that they are all working properly.
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ื›ื™ ื”ื ื›ื•ืœื ืคื•ืขืœื™ื ื›ืฉื•ืจื”
01:06
Would somebody get us started by giving us a two-digit number, please?
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ื”ืื ืžื™ืฉื”ื• ื™ื›ื•ืœ ืœืขื–ื•ืจ ืœื ื• ืœื”ืชื—ื™ืœ ื•ื™ื™ืชืŸ ืœื ื•
ืžืกืคืจ ื“ื• ืกืคืจืชื™ ื‘ื‘ืงืฉื”?
01:11
How about a two-digit number?
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ื”ืื ืืคืฉืจ ืžืกืคืจ ื“ื• ืกืคืจืชื™?
01:13
Audience: 22.
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ืงื”ืœ: 22
01:14
AB: 22. And another two-digit number, sir?
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ืืจืชื•ืจ ื‘ื ื’ 'ืžื™ืŸ: 22. ื•ืขื•ื“ ืžืกืคืจ ื“ื• ืกืคืจืชื™, ืื“ื•ื ื™?
01:16
Audience: 47.
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ืงื”ืœ: 47
01:17
AB: Multiply 22 times 47, make sure you get 1,034,
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ืืจืชื•ืจ ื‘ื ื’ 'ืžื™ืŸ: ื”ื›ืคื™ืœื• 22 ืคื™ 47, ื•ื“ืื• ืฉืืชื ืžืงื‘ืœื™ื 1,034
01:21
or the calculators are not working.
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ืื• ืฉื”ืžื—ืฉื‘ื•ื ื™ื ืื™ื ื ืขื•ื‘ื“ื™ื. ื”ืื ื›ื•ืœื›ื ืงื™ื‘ืœืชื 1,034? 1,034?
01:22
Do all of you get 1,034? 1,034?
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01:26
Volunteer: No.
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ืื™ืฉื”: ืœื
01:27
AB: 594. Let's give three of them a nice round of applause there.
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ืืจืชื•ืจ ื‘ื ื’ 'ืžื™ืŸ: 594. ื‘ื•ืื• ื ื™ืชืŸ ืœืฉืœื•ืฉื” ืžื”ื ืžื—ื™ืื•ืช ื›ืคื™ื™ื
01:31
(Applause)
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[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
01:33
Would you like to try a more standard calculator, just in case?
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ื”ืื ืœื™ืชืจ ื‘ื™ื˜ื—ื•ืŸ, ืชืจืฆื™ ืœื ืกื•ืช ืžื—ืฉื‘ื•ืŸ ื™ื•ืชืจ ืกื˜ื ื“ืจื˜ื™?
ื‘ืกื“ืจ, ื ื”ื“ืจ
01:36
OK, great.
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01:37
What I'm going to try and do then --
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ืื ื›ืŸ, ืžื” ืฉืื ื™ ื”ื•ืœืš ืœื ืกื•ืช ืœืขืฉื•ืช
01:39
I notice it took some of you a little bit of time to get your answer.
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ืฉืžืชื™ ืœื‘ ื›ื™ ืœืงื— ืœื—ืœืงื›ื ืžืขื˜ ื–ืžืŸ ื›ื“ื™ ืœืงื‘ืœ ืืช ื”ืชืฉื•ื‘ื”, ื–ื” ื‘ืกื“ืจ
01:42
That's OK.
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ืื ื™ ืืคื™ืœื• ืืชืŸ ืœื›ื ื“ืจืš ืงื™ืฆื•ืจ ืžื”ื™ืจื” ื™ื•ืชืจ
01:43
I'll give you a shortcut for multiplying even faster on the calculator.
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ืœื”ื›ืคืœื” ื‘ืžื—ืฉื‘ื•ืŸ
01:47
There is something called the square of a number,
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ื™ืฉ ืžืฉื”ื• ืฉื ืงืจื ืจื™ื‘ื•ืข ืฉืœ ืžืกืคืจ
01:49
which most of you know is taking a number and multiplying it by itself.
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ืืฉืจ ื›ืžื• ืฉื›ื•ืœื›ื ื•ื“ืื™ ืžื›ื™ืจื™ื
ื–ื•ื”ื™ ื”ืคืขื•ืœื” ืฉืœ ื”ื›ืคืœืช ืžืกืคืจ ื‘ืขืฆืžื•
01:53
For instance, five squared would be?
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ืœื“ื•ื’ืžื”, 5 ื‘ืจื™ื‘ื•ืข ื™ื”ื™ื”?
01:55
Audience: 25.
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ืงื”ืœ: 25
01:56
AB: 25. The way we can square on most calculators --
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 25. ืขื›ืฉื™ื•, ื”ื“ืจืš ื‘ื” ืื ื• ื™ื›ื•ืœื™ื ืœื”ืขืœื•ืช ื‘ืจื™ื‘ื•ืข ื‘ืจื•ื‘ ื”ืžื—ืฉื‘ื•ื ื™ื
01:58
let me demonstrate with this one --
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ืชืŸ ืœื™ ืœื”ื“ื’ื™ื ืขื ื”ืื—ื“ ื”ื–ื”
02:00
is by taking the number, such as five,
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ื”ื™ื ืœืงื—ืช ืืช ื”ืžืกืคืจ, ืœื“ื•ื’ืžื” 5
02:02
hitting "times" and then "equals,"
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ืœืœื—ื•ืฅ "ื”ื›ืคืœ" ื•ืœืื—ืจ ืžื›ืŸ "ืฉื•ื•ื”"
02:05
and on most calculators that will give you the square.
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ื•ื‘ืจื•ื‘ ื”ืžื—ืฉื‘ื•ื ื™ื ื ืงื‘ืœ ืืช ื”ืชื•ืฆืื” ืขื‘ื•ืจ ืจื™ื‘ื•ืข ื”ืžืกืคืจ
02:08
On some of these ancient RPN calculators,
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ื‘ื—ืœืง ืžืžื—ืฉื‘ื•ื ื™ ื” RPN ื”ืขืชื™ืงื™ื ื™ื•ืชืจ
02:10
you've got an "x squared" button on it,
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ื™ืฉ ื›ืคืชื•ืจ ืฉืœ "x ื‘ืจื™ื‘ื•ืข"
02:12
will allow you to do the calculation even faster.
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ืฉืžืืคืฉืจ ืœืขืฉื•ืช ืืช ื”ื—ื™ืฉื•ื‘ ืืคื™ืœื• ืžื”ืจ ื™ื•ืชืจ
02:15
What I'm going to try and do now is to square, in my head,
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ืžื” ืฉืื ื™ ื”ื•ืœืš ืœื ืกื•ืช ื•ืœืขืฉื•ืช ืขื›ืฉื™ื• ื–ื” ืœื—ืฉื‘ ื‘ืจืืฉื™
02:18
four two-digit numbers
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ืืช ื”ืจื™ื‘ื•ืข ืฉืœ ืืจื‘ืข ืžืกืคืจื™ื ื“ื• ืกืคืจืชื™ื™ื
02:20
faster than they can do on their calculators,
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ืžื”ืจ ื™ื•ืชืจ ืžืืฉืจ ื”ื ื™ื›ื•ืœื™ื ืœืขืฉื•ืช ืขื ื”ืžื—ืฉื‘ื•ื ื™ื, ืืคื™ืœื• ืข"ื™ ืฉื™ืžื•ืฉ ื‘ืฉื™ื˜ืช ื”ื—ื™ืฉื•ื‘ ื”ืžืงื•ืฆืจืช
02:22
even using the shortcut method.
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02:24
What I'll use is the second row this time,
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ื”ืคืขื ืื ื™ ืืคื ื” ืœื™ื•ืฉื‘ื™ื ื‘ืฉื•ืจื” ื”ืฉื ื™ื™ื” ื•ืื‘ืงืฉ ืžืืจื‘ืขืชื›ื
02:26
and I'll get four of you
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ืฉื›ืœ ืื—ื“ ื™ืฆืขืง ืžืกืคืจ ื“ื• ืกืคืจืชื™ 1, 2, 3, 4,
02:28
to each yell out a two-digit number,
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02:29
and if you would square the first number,
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ื•ืื ืืช ืชื—ืฉื‘ื™ ืืช ืจื™ื‘ื•ืข ื”ืžืกืคืจ ื”ืจืืฉื•ืŸ
02:33
and if you would square the second, the third and the fourth,
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ื•ืืช ืืช ืจื™ื‘ื•ืข ื”ืžืกืคืจ ื”ืฉื ื™, ืืช ื”ืฉืœื™ืฉื™ ื•ื”ืจื‘ื™ืขื™
ืื ื™ ืื ืกื” ืœื”ืชื—ืจื•ืช ื‘ื›ื ื‘ื—ื™ืฉื•ื‘ ื”ืชืฉื•ื‘ื”. ื‘ืกื“ืจ?
02:36
I will try and race you to the answer. OK?
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02:38
So quickly, a two-digit number please.
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ื‘ื–ืจื™ื–ื•ืช... ืžืกืคืจ ื“ื• ืกืคืจืชื™ ื‘ื‘ืงืฉื”
02:41
Audience: 37.
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ืงื”ืœ: 37
02:42
Arthur Benjamin: 37 squared, OK.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 37 ื‘ืจื™ื‘ื•ืข, ื‘ืกื“ืจ
02:44
Audience: 23.
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ืงื”ืœ: 23
02:45
AB: 23 squared, OK.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 23 ื‘ืจื™ื‘ื•ืข, ื‘ืกื“ืจ
02:46
Audience: 59.
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02:47
AB: 59 squared, OK, and finally?
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ืงื”ืœ: 59
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 59 ื‘ืจื™ื‘ื•ืข, ื‘ืกื“ืจ. ื•ืื—ืจื•ืŸ?
02:49
Audience: 93.
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ืงื”ืœ: 93
02:50
AB: 93 squared.
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02:51
Would you call out your answers, please?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 93 ื‘ืจื™ื‘ื•ืข. ืงืจืื• ื‘ืงื•ืœ ืืช ืชืฉื•ื‘ื•ืชื™ื›ื ื‘ื‘ืงืฉื”
02:54
Volunteer: 1369. AB: 1369.
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ืื™ืฉื”: 1369. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 1369
02:56
Volunteer: 529. AB: 529.
71
176160
1976
ื”ืื™ืฉื”: 529
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 529
02:58
Volunteer: 3481. AB: 3481.
72
178160
1976
ืื™ืฉ: 3481
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 3481
03:00
Volunteer: 8649.
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180160
1023
ืื™ืฉ: 8649
03:01
AB: Thank you very much.
74
181207
1159
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืชื•ื“ื” ืจื‘ื” ืœื›ื
03:02
(Applause)
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5113
[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
03:07
Let me try to take this one step further.
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ืชื ื• ืœื™ ืœื ืกื•ืช ืœืงื—ืช ืืช ื–ื” ืฆืขื“ ืื—ื“ ืงื“ื™ืžื”
03:10
I'm going to try to square some three-digit numbers this time.
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190479
3021
ืื ื™ ื”ืคืขื ื”ื•ืœืš ืœื ืกื•ืช ื•ืœื”ืขืœื•ืช ื‘ืจื™ื‘ื•ืข ืžืกืคืจื™ื ืชืœืช ืกื™ืคืจืชื™ื
03:13
I won't even write these down --
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1612
ืื ื™ ืืคื™ืœื• ืœื ืืจืฉื•ื ืื•ืชื ืขืœ ื“ืฃ
03:15
I'll just call them out as they're called out to me.
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ืืœื ืคืฉื•ื˜ ืื•ืžืจ ืื•ืชื ื‘ื”ืชืื ืœืžืกืคืจื™ื ืฉืชืืžืจื• ืœื™
03:17
Anyone I point to, call out a three-digit number.
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197661
2475
ืžื™ ืฉืืฆื‘ื™ืข ืืœื™ื• ืฉื™ืืžืจ ื‘ืงื•ืœ ืžืกืคืจ ืชืœืช ืกื™ืคืจืชื™
03:20
Anyone on our panel, verify the answer.
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2196
ื•ืžื™ืฉื”ื• ืžื”ืคื ืœ ื™ืืžืช ืืช ื”ืชืฉื•ื‘ื”
03:22
Just give some indication if it's right.
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202380
2023
ืจืง ืชื ื• ืื™ื–ื• ืฉื”ื™ื ืื™ื ื“ื™ืงืฆื™ื” ืื ื”ื™ื ื ื›ื•ื ื”
03:24
A three-digit number, sir, yes?
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2603
ื›ืŸ ืื“ื•ื ื™, ืžืกืคืจ ืชืœืช ืกืคืจืชื™?
03:27
Audience: 987.
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207054
1082
ืงื”ืœ: 987
03:28
AB: 987 squared is 974,169.
85
208160
3459
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 987 ื‘ืจื™ื‘ื•ืข ื–ื” 974,169
03:31
(Laughter)
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2080
[ืฆื—ื•ืง]
03:33
AB: Yes? Good.
87
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1670
ื ื›ื•ืŸ? ื˜ื•ื‘
03:35
Another three-digit --
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ืžืกืคืจ ืชืœืช ืกื™ืคืจืชื™ ื ื•ืกืฃ
03:37
(Applause)
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1930
[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
ืžืกืคืจ ืชืœืช ืกื™ืคืจืชื™ ื ื•ืกืฃ ืื“ื•ื ื™?
03:39
-- another three-digit number, sir?
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219115
2438
03:41
Audience: 457.
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1006
ืงื”ืœ: 457
03:42
AB: 457 squared is 205,849.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 457 ื‘ืจื™ื‘ื•ืข ื–ื” 205,849
03:45
205,849?
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205,849
03:47
AB: Yes?
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ื ื›ื•ืŸ?
03:48
OK, another, another three-digit number, sir?
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ื˜ื•ื‘, ืขื•ื“ ืื—ื“, ืขื•ื“ ืžืกืคืจ ืชืœืช ืกืคืจืชื™ ืื“ื•ื ื™?
03:51
Audience: 321.
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231353
1024
03:52
AB: 321 is 103,041.
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ืงื”ืœ: 321
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 321 ื–ื” 103,041. 103,041?
03:55
103,041.
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ื ื›ื•ืŸ? ืžืกืคืจ ืชืœืช ืกื™ืคืจืชื™ ื ื•ืกืฃ ื‘ื‘ืงืฉื”
03:57
Yes? One more three-digit number please.
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ืงื”ืœ: 722
04:00
Audience: Oh, 722.
100
240327
1158
04:01
AB: 722 is 500, that's a harder one.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 722 ื–ื” 500... ืื•ื• ื–ื” ืงืฉื”
04:04
Is that 513,284?
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ื”ืื ื–ื” 513,284?
04:07
Volunteer: Yes.
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1055
ืื™ืฉื”: ื›ืŸ
04:08
AB: Yes? Oh, one more, one more three-digit number please.
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2889
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื›ืŸ? ืื•ื•, ืขื•ื“ ืื—ื“, ืžืกืคืจ ืชืœืช ืกื™ืคืจืชื™ ืื—ื“ ื ื•ืกืฃ ื‘ื‘ืงืฉื”
04:11
Audience: 162.
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ืงื”ืœ: 162
04:12
162 squared is 26,244.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 162 ื‘ืจื™ื‘ื•ืข ื–ื” 26,244
04:16
Volunteer: Yes.
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ืชื•ื“ื” ืจื‘ื” ืœื›ื
04:17
Thank you very much.
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1009
04:18
(Applause)
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[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
04:23
(Applause ends)
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04:25
Let me try to take this one step further.
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ืชื ื• ืœื™ ืœื ืกื•ืช ืœืงื—ืช ืืช ื–ื” ืฆืขื“ ืื—ื“ ืงื“ื™ืžื”
04:28
(Laughter)
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[ืฆื—ื•ืง]
04:29
I'm going to try to square a four-digit number this time.
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ืื ื™ ื”ื•ืœืš ื”ืคืขื ืœื ืกื•ืช ืœื”ืขืœื•ืช ื‘ืจื™ื‘ื•ืข ืžืกืคืจ ื‘ืขืœ ืืจื‘ืข ืกืคืจื•ืช
04:33
You can all take your time on this;
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ืขื›ืฉื™ื• ืืชื ื™ื›ื•ืœื™ื ืœืงื—ืช ืืช ื”ื–ืžืŸ, ืื ื™ ืœื ืื ืกื” ืœื”ืชื—ืจื•ืช ื‘ื›ื ื‘ื—ื™ืฉื•ื‘ ื”ืชืฉื•ื‘ื” ื‘ืžืงืจื” ื–ื”
04:34
I will not beat you to the answer on this one,
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ืื‘ืœ ืื ื™ ื›ืŸ ืื ืกื” ืœื”ื’ื™ืข ืœืชืฉื•ื‘ื” ื”ื ื›ื•ื ื”
04:37
but I will try to get the answer right.
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ื›ื“ื™ ืœื”ืคื•ืš ืืช ื–ื” ืงืฆืช ื™ื•ืชืจ ืืงืจืื™, ื‘ื•ืื• ื ื™ืงื— ืืช ื”ืฉื•ืจื” ื”ืจื‘ื™ืขื™ืช ื”ืคืขื
04:39
To make this a little bit more random, let's take the fourth row this time,
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ื ื ื™ื—, 1, 2, 3, 4
04:42
let's say, one, two, three, four.
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04:44
If each of you would call out a single digit between zero and nine,
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ืื ื›ืœ ืื—ื“ ืžื›ื ื™ืงืจื ืกืคืจื” ืื—ืช ื‘ื™ืŸ ืืคืก ืœืชืฉืขื”
ื–ื” ื™ื”ื™ื” ื”ืžืกืคืจ ื‘ืŸ ืืจื‘ืขืช ื”ืกืคืจื•ืช ืื•ืชื• ืืขืœื” ื‘ืจื™ื‘ื•ืข
04:47
that will be the four-digit number that I'll square.
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ืงื”ืœ: 9
04:50
Nine.
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1365
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 9
04:51
Seven.
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ืงื”ืœ: 7. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 7
04:52
Five.
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ืงื”ืœ: 5. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 5
ืงื”ืœ: 8. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 8
04:54
Eight.
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04:55
9,758, this will take me a little bit of time, so bear with me.
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9,758. ื–ื” ื™ื™ืงื— ืœื™ ืงืฆืช ื–ืžืŸ, ืื– ื”ื™ืฉืืจื• ืื™ืชื™
04:58
95 million --
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95,218,564?
05:01
(Sighs)
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05:04
218,564?
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05:07
Volunteer: Yes!
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ืื™ืฉื”: ื›ืŸ
05:08
AB: Thank you very much.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืชื•ื“ื” ืจื‘ื” ืœื›ื
05:10
(Applause)
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[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
05:16
(Applause ends)
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05:18
Now, I would attempt to square a five-digit number --
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ืขื›ืฉื™ื•, ื”ื™ื™ืชื™ ืžื ืกื” ืœื”ืขืœื•ืช ื‘ืจื™ื‘ื•ืข ืžืกืคืจ ื‘ืขืœ ื—ืžืฉ ืกืคืจื•ืช
05:21
and I can --
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ื•ืื ื™ ื™ื›ื•ืœ
05:22
but unfortunately, most calculators cannot.
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ืื‘ืœ ืœืžืจื‘ื” ื”ืฆืขืจ ืจื•ื‘ ื”ืžื—ืฉื‘ื•ื ื™ื ืœื ื™ื›ื•ืœื™ื
05:25
(Laughter)
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[ืฆื—ื•ืง]
05:27
Eight-digit capacity -- don't you hate that?
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ืงื™ื‘ื•ืœืช ืฉืœ ืฉืžื•ื ื” ืกืคืจื•ืช, ืืชื ืœื ืฉื•ื ืื™ื ืืช ื–ื”?
05:30
So, since we've reached the limits of our calculators --
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ืื– ืžืื—ืจ ื•ื”ื’ืขื ื• ืœื’ื‘ื•ืœ ื”ื™ื›ื•ืœืช ืฉืœ ื”ืžื—ืฉื‘ื•ื ื™ื ืฉืœื ื•
05:33
what's that?
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ืžื” ื–ื”? ื”ืื ืฉืœืš ื™ื›ื•ืœ
05:35
Does yours go higher?
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ืื™ืฉื”: ืื ื™ ืœื ื™ื•ื“ืขืช
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื”ืื ืฉืœืš ื™ื›ื•ืœ ื™ื•ืชืจ?
05:38
Volunteer: I don't know.
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05:39
AB: Oh, yours does?
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ื”ืื ืฉืœืš?
05:41
Volunteer: I can probably do it. AB: I'll talk to you later.
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ืื™ืฉ: ืื ื™ ื›ื›ืœ ื”ื ืจืื” ื™ื›ื•ืœ ืœืขืฉื•ืช ื–ืืช
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืื ื™ ืื“ื‘ืจ ืื™ืชืš ืžืื•ื—ืจ ื™ื•ืชืจ
05:44
In the meanwhile, let me conclude
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ื‘ื™ื ืชื™ื™ื ืชื ื• ืœื™ ืœืกื™ื™ื ืืช ื”ื—ืœืง ื”ืจืืฉื•ืŸ ืฉืœ ื”ื”ื•ืคืขื” ืฉืœื™
05:46
the first part of my show by doing something a little trickier.
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ื‘ื›ืš ืฉืืขืฉื” ืžืฉื”ื• ืงืฆืช ื˜ืจื™ืงื™
05:49
Let's take the largest number on the board here, 8649.
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ื‘ื•ืื• ื ื™ืงื— ืืช ื”ืžืกืคืจ ื”ื’ื“ื•ืœ ื‘ื™ื•ืชืจ ืขืœ ืœื•ื— ื›ืืŸ, 8649
05:52
Would you each enter that on your calculator?
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ื‘ื‘ืงืฉื” ืฉื›ืœ ืื—ื“ ืžื›ื ื™ื–ื™ืŸ ืื•ืชื• ื‘ืžื—ืฉื‘ื•ืŸ
05:55
And instead of squaring it this time,
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ื•ื”ืคืขื ื‘ืžืงื•ื ืœื—ืฉื‘ ืืช ืจื™ื‘ื•ืข ื”ืžืกืคืจ
05:57
I want you to take that number and multiply it
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ืื ื™ ืจื•ืฆื” ืฉืชื™ืงื—ื• ืืช ื”ืžืกืคืจ ื•ืชื›ืคื™ืœื• ืื•ืชื•
05:59
by any three-digit number that you want,
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ื‘ื›ืœ ืžืกืคืจ ืชืœืช ืกื™ืคืจืชื™ ืืงืจืื™ ืฉืชืจืฆื•
06:02
but don't tell me what you're multiplying by --
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ืื‘ืœ ืืœ ืชื’ื™ื“ื• ืœื™ ื‘ืžื” ื”ื›ืคืœืชื
06:04
just multiply it by any random three-digit number.
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ืจืง ืชื›ืคื™ืœื• ืื•ืชื• ื‘ืžืกืคืจ ืชืœืช ืกืคืจืชื™ ืืงืจืื™
06:07
So you should have as an answer either
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ื›ืš ืฉื”ืชืฉื•ื‘ื” ืฉืชืงื‘ืœื• ืฆืจื™ื›ื” ืœื”ื™ื•ืช
06:09
a six-digit or probably a seven-digit number.
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ืžืกืคืจ ื‘ืขืœ ืฉืฉ ืกืคืจื•ืช ืื• ืงืจื•ื‘ ืœื•ื•ื“ืื™ ืžืกืคืจ ื‘ืขืœ ืฉื‘ืข ืกืคืจื•ืช
06:12
How many digits do you have, six or seven?
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ื›ืžื” ืกืคืจื•ืช ื™ืฉ ืœืš, ืฉืฉ ืื• ืฉื‘ืข?
06:14
Seven, and yours?
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7, ื•ืฉืœืš? ืื™ืฉื”: 7
06:16
Seven? Seven?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 7? 7?
ื•ืœื ื‘ื˜ื•ื—
06:20
And, uncertain.
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06:21
Seven.
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ืื™ืฉ: ื›ืŸ
06:22
Is there any possible way that I could know
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืฉื‘ืข. ื”ืื ื™ืฉ ืื™ื–ื• ื“ืจืš ืืคืฉืจื™ืช ืฉืื ื™ ื™ื›ื•ืœ ืœื“ืขืช
06:24
what seven-digit numbers you have?
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ืžื”ื• ื”ืžืกืคืจ ื‘ืขืœ ืฉื‘ืข ืกืคืจื•ืช ืฉืงื™ื‘ืœืชื? ืชื’ื™ื“ื• "ืœื"
06:26
Say "No."
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06:27
(Laughter)
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[ืฆื—ื•ืง]
06:28
Good, then I shall attempt the impossible --
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ื˜ื•ื‘. ืื ื›ืŸ ืื ื™ ืื ืกื” ืืช ื”ื‘ืœืชื™ ืืคืฉืจื™
06:31
or at least the improbable.
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ืื• ืœืคื—ื•ืช ืืช ื”ื‘ืœืชื™ ืกื‘ื™ืจ
06:33
What I'd like each of you to do is to call out for me
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ืžื” ืฉืื ื™ ืื‘ืงืฉ ืžื›ืœ ืื—ื“ ืžื›ื ืœืขืฉื•ืช ื–ื” ืœื”ืงืจื™ื ืœื™
06:35
any six of your seven digits, any six of them,
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ืฉืฉ ืกืคืจื•ืช ื›ืœ ืฉื”ืŸ ืžืฉื‘ืขืช ื”ืกืคืจื•ืช ืฉืœ ื”ืžืกืคืจ ืฉืงื™ื‘ืœืชื
06:38
in any order you'd like.
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ืฉืฉ ืกืคืจื•ืช ื›ืœ ืฉื”ืŸ, ื‘ื›ืœ ืกื“ืจ ืฉืชืจืฆื•.
06:40
(Laughter)
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[ืฆื—ื•ืง]
ืกืคืจื” ืื—ืช ื‘ื›ืœ ืคืขื, ื•ืื ื™ ืื ืกื” ืœืงื‘ื•ืข ืืช ื”ืกืคืจื” ืฉื”ืฉืžื˜ืชื
06:42
One digit at a time,
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06:43
I shall try and determine the digit you've left out.
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ืื–, ื ืชื—ื™ืœ ืขื ื”ืžืกืคืจ ื‘ืขืœ ืฉื‘ืขืช ื”ืกืคืจื•ืช ืฉืœืš
06:47
Starting with your seven-digit number,
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ืงืจืื™ ืฉืฉ ืกืคืจื•ืช ื›ืœ ืฉื”ืŸ ื‘ื‘ืงืฉื”
06:49
call out any six of them please.
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06:50
Volunteer: 1, 9, 7, 0, 4, 2.
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ืื™ืฉื”: ืื—ืช, ื‘ืกื“ืจ, 197042
06:56
AB: Did you leave out the number 6?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื”ืื ื”ืฉืžื˜ืช ืืช ื”ืกืคืจื” 6?
06:57
Good, OK, that's one.
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ื”ืื™ืฉื”: ื›ืŸ, ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื˜ื•ื‘, ื‘ืกื“ืจ, ื–ื” ืื—ื“
06:59
You have a seven-digit number, call out any six of them please.
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ื™ืฉ ืœืš ืžืกืคืจ ื‘ืขืœ ืฉื‘ืข ืกืคืจื•ืช, ืงืจื ืฉืฉ ื›ืœืฉื”ืŸ ื‘ื‘ืงืฉื”
ืื™ืฉื”: 44875
07:02
Volunteer: 4, 4, 8, 7, 5.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืื ื™ ื—ื•ืฉื‘ ืฉืฉืžืขืชื™ ืจืง ื—ืžืฉ ืกืคืจื•ืช. ืื ื™ - ื—ื›ื™ - 44875
07:05
I think I only heard five numbers. I -- wait -- 44875 --
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07:09
did you leave out the number 6?
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ื”ืื ื”ืฉืžื˜ืช ืืช ื”ืกืคืจื” 6?
07:11
Same as she did, OK.
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ืื™ืฉื”: ื›ืŸ. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื›ืžื• ืฉื”ื™ื ืขืฉืชื”, ื˜ื•ื‘. ืœืš ื™ืฉ ืžืกืคืจ ื‘ืขืœ ืฉื‘ืข ืกืคืจื•ืช
07:12
You've got a seven-digit number --
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ืงืจื ืฉืฉ ื›ืœ ืฉื”ืŸ ื‘ืงื•ืœ ืจื ื•ื‘ืจื•ืจ
07:14
call out any six of them loud and clear.
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07:16
Volunteer: 0, 7, 9, 0, 4, 4.
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ืื™ืฉ: 079044
07:20
I think you left out the number 3?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืื ื™ ื—ื•ืฉื‘ ืฉืืชื” ื”ืฉืžื˜ืช ืืช ื”ืกืคืจื” 3
07:22
AB: That's three.
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ื–ื” ืฉืœื•ืฉ. ื”ืกื™ื›ื•ื™ ืฉืœื™ ืœืขื ื•ืช ื ื›ื•ืŸ ืขืœ ื›ืœ ื”ืืจื‘ืข ืข"ื™ ื ื™ื—ื•ืฉ ืืงืจืื™
07:24
The odds of me getting all four of these right by random guessing
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ืขื•ืžื“ ืขืœ ืื—ื“ ืœ 10.000. 10 ื‘ืจื‘ื™ืขื™ืช
07:27
would be one in 10,000: 10 to the fourth power.
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07:29
OK, any six of them.
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ื‘ืกื“ืจ, ืฉืฉ ื›ืœ ืฉื”ืŸ
07:31
(Laughter)
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07:32
Really scramble them up this time, please.
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ืชืขืจื‘ื‘ ืื•ืชืŸ ื”ื™ื˜ื‘ ื”ืคืขื, ื‘ื‘ืงืฉื”
07:34
Volunteer: 2, 6, 3, 9, 7, 2.
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ืื™ืฉ: 263972
07:38
Did you leave out the number 7?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื”ืื ื”ืฉืžื˜ืช ืืช ื”ืกืคืจื” 7?
07:39
And let's give all four of these people a nice round of applause.
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ื•ื ื™ืชืŸ ืœืืจื‘ืขืช ื”ืื ืฉื™ื ื”ืœืœื• ืžื—ื™ืื•ืช ื›ืคื™ื™ื
ืชื•ื“ื” ืจื‘ื” ืœื›ื
07:43
Thank you very much.
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07:44
(Applause)
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07:50
(Applause ends)
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ืœืงื˜ืข (ืžืกืคืจ) ื”ื‘ื ืฉืœื™
07:53
For my next number --
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07:54
(Laughter)
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[ืฆื—ื•ืง]
07:57
while I mentally recharge my batteries,
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ื‘ืขื•ื“ ืžื ื˜ืืœื™ืช ืื ื™ ื˜ื•ืขืŸ ืขืฆืžื™ ืฉื•ื‘
ื™ืฉ ืœื™ ืฉืืœื” ื ื•ืกืคืช ืœืงื”ืœ
08:00
I have one more question for the audience.
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08:02
By any chance, does anybody here happen to know
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ื”ืื ื‘ืžืงืจื”, ืžื™ืฉื”ื• ื›ืืŸ ื™ื•ื“ืข
08:07
the day of the week that they were born on?
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ืืช ื”ื™ื•ื ื‘ืฉื‘ื•ืข, ื‘ื• ื”ื•ื ื ื•ืœื“?
08:10
If you think you know your birth day, raise your hand.
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ืื ืžื™ืฉื”ื• ื—ื•ืฉื‘ ืฉื”ื•ื ื™ื•ื“ืข ืืช ื”ื™ื•ื ื‘ื• ื”ื•ื ื ื•ืœื“, ืฉื™ืจื™ื ืืช ื™ื“ื•
08:14
Let's see, starting with -- let's start with a gentleman first.
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ื”ื‘ื” ื ืจืื”, ื ืชื—ื™ืœ ืขื...ืจืืฉื•ืŸ ื ืชื—ื™ืœ ืขื ืื“ื•ืŸ
08:17
What year was it, first of all?
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ื˜ื•ื‘ ืื“ื•ื ื™, ืงื•ื“ื ื›ืœ, ื‘ืื™ื–ื• ืฉื ื” ื–ื” ื”ื™ื”? ื–ื• ื”ืกื™ื‘ื” ืฉืื ื™ ืžืชื—ื™ืœ ืงื•ื“ื ืขื ืื“ื•ืŸ
08:19
That's why I pick a gentleman first.
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ื‘ืื™ื–ื• ืฉื ื”?
08:21
Audience: 1953.
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ืงื”ืœ: 1953
08:22
1953, and the month?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ:1953, ื•ื”ื—ื•ื“ืฉ?
08:24
November what?
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ืงื”ืœ: ื ื•ื‘ืžื‘ืจ. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืžื” ื‘ื ื•ื‘ืžื‘ืจ?
ืงื”ืœ: ื”-23
08:26
23rd -- was that a Monday?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 23 โ€“ ื”ืื ื”ื™ื” ื–ื” ื™ื•ื ืฉื ื™?
08:28
Audience: Yes.
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ื›ืŸ, ื˜ื•ื‘. ืžื™ืฉื”ื• ืื—ืจ? ืžื™ ืขื•ื“ ื”ื™ื” ืจื•ืฆื”
08:29
Good. Somebody else?
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08:30
I haven't seen any women's hands up.
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ืื ื™ ืœื ืจื•ืื”... ืœื ืจืื™ืชื™ ื™ื“ื™ื™ื ืฉืœ ื ืฉื™ื ืžื•ืจืžื•ืช
08:32
OK, how about you, what year?
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ื‘ืกื“ืจ, ื–ื”.. ืžื” ืื™ืชืš, ื‘ืื™ื–ื• ืฉื ื”?
08:34
1949, and the month?
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ืงื”ืœ: 1949. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ :1949, ื•ื”ื—ื•ื“ืฉ?
08:36
October what?
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ืงื”ืœ: ืื•ืงื˜ื•ื‘ืจ. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืžื” ื‘ืื•ืงื˜ื•ื‘ืจ?
ืงื”ืœ: ื”ื—ืžื™ืฉื™
08:38
Fifth -- was that a Wednesday?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื”ื—ืžื™ืฉื™. ื”ืื ื”ื™ื” ื–ื” ื™ื•ื ืจื‘ื™ืขื™?
08:39
Yes! I'll go way to the back right now, how about you?
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ื›ืŸ, ืฉืœื™... ืื ื™ ื™ืขื‘ื•ืจ ืœื—ืœืง ื”ืื—ื•ืจื™ ืขื›ืฉื™ื•, ืžื” ืื™ืชืš?
08:42
Yell it out, what year?
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ืฆืขืง ืืช ื–ื”, ืžื” ื”ืฉื ื”? ืงื”ืœ: 1959
08:43
Audience: 1959.
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08:44
1959, OK -- and the month?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 1959, ื˜ื•ื‘ - ื•ื”ื—ื•ื“ืฉ?
ืงื”ืœ: ืคื‘ืจื•ืืจ
08:47
Audience: February.
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08:48
February what?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืžื” ื‘ืคื‘ืจื•ืืจ? ืงื”ืœ: ื”ืฉื™ืฉื™
08:50
Sixth -- was that a Friday? Audience: Yes.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื”ืฉื™ืฉื™ - ื”ืื ื”ื™ื” ื–ื” ื™ื•ื ืฉื™ืฉื™?
08:52
Good, how about the person behind her?
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ืงื”ืœ: ื›ืŸ. ื˜ื•ื‘, ืžื” ืœื’ื‘ื™ ื”ืื“ื ืžืื—ื•ืจื™ื”?
08:54
Call out, what year was it?
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ืืžื•ืจ- ื‘ืื™ื–ื• ืฉื ื” ื–ื” ื”ื™ื”?
08:56
Audience: 1947. AB: 1947, and the month?
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ืงื”ืœ: 1947. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 1947, ื•ื”ื—ื•ื“ืฉ?
08:58
Audience: May. AB: May what?
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ืงื”ืœ: ืžืื™ ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืžื” ื‘ืžืื™?
09:00
Seventh -- would that be a Wednesday?
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ืงื”ืœ: ื”ืฉื‘ื™ืขื™. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื”ืฉื‘ื™ืขื™ - ื”ืื ื”ื™ื” ื–ื” ื™ื•ื ืจื‘ื™ืขื™?
09:02
Audience: Yes. AB: Thank you very much.
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ืงื”ืœ: ื›ืŸ
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืชื•ื“ื” ืจื‘ื” ืœื›ื
09:04
(Applause)
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[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
09:09
Anybody here who'd like to know the day of the week they were born?
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ืžื™ืฉื”ื• ืคื” ืจื•ืฆื” ืœื“ืขืช ืืช ื”ื™ื•ื ื‘ืฉื‘ื•ืข ื”ื ื ื•ืœื“ื•?
09:12
We can do it that way.
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ืื ื—ื ื• ื™ื›ื•ืœื™ื ืœืขืฉื•ืช ืืช ื–ื” ื›ื›ื”
09:14
Of course, I could just make up an answer and you wouldn't know,
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ื›ืžื•ื‘ืŸ, ืื ื™ ื™ื›ื•ืœ ืกืชื ืœื”ืžืฆื™ื ืชืฉื•ื‘ื” ื•ืืชื ืœื ืชื“ืขื•
ืœื›ืŸ ื‘ืืชื™ ืžื•ื›ืŸ ืœื–ื”
09:17
so I come prepared for that.
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09:18
I brought with me a book of calendars.
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ื”ื‘ืืชื™ ืื™ืชื™ ืกืคืจ ืœื•ื—ื•ืช ืฉื ื”
09:21
It goes as far back into the past as 1800, because you never know.
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ืฉืžื’ื™ืข ืื—ื•ืจื” ืขื“ 1800, ื›ื™ ืืฃ ืคืขื ืื™ ืืคืฉืจ ืœื“ืขืช
09:25
(Laughter)
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[ืฆื—ื•ืง]
09:27
I didn't mean to look at you, sir -- you were just sitting there.
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ืœื ื”ืชื›ื•ื•ื ืชื™ ืœื”ืกืชื›ืœ ืขืœื™ืš ืื“ื•ื ื™
ืืชื” ืคืฉื•ื˜ ื™ื•ืฉื‘ ืฉื
09:30
(Laughter)
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09:31
Anyway, Chris, you can help me out here, if you wouldn't mind.
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ื‘ื›ืœ ืžืงืจื”, ื›ืจื™ืก, ืืชื” ื™ื›ื•ืœ ืœืขื–ื•ืจ ืœื™ ื‘ื–ื”, ืื ืœื ืื›ืคืช ืœืš
09:34
This is a book of calendars.
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ื–ื”ื• ืกืคืจ ืœื•ื—ื•ืช ื”ืฉื ื”, ื•ืื ื™ ืืฉืืœ
09:36
Who wanted to know their birth day?
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ืžื™ ื–ื” ื”ื™ื” ืฉืจืฆื” ืœื“ืขืช ืืช ื”ื™ื•ื ื‘ื• ื ื•ืœื“? ืืชื” ืื“ื•ื ื™? ื˜ื•ื‘
09:38
What year was it, first of all?
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ืื™ื–ื” ืฉื ื” ื–ื” ื”ื™ื”, ืงื•ื“ื ื›ืœ?
09:40
Audience: 1966.
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ืงื”ืœ: 1966
09:41
66 -- turn to the calendar with 1966.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: '66 ืชืขื‘ื•ืจ ื‘ืœื•ื— ื”ืฉื ื” ืœืฉื ืช 1966
09:43
And what month?
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ื•ื‘ืื™ื–ื” ื—ื•ื“ืฉ?
09:45
Audience: April. AB: April what?
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ืงื”ืœ: ืืคืจื™ืœ. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืžื” ื‘ืืคืจื™ืœ?
09:47
Audience: 17th.
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ืงื”ืœ: ื”- 17. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื”- 17.. ืื ื™ ืžืืžื™ืŸ ืฉื–ื” ื”ื™ื” ื™ื•ื ืจืืฉื•ืŸ
09:48
I believe that was a Sunday.
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09:50
Can you confirm, Chris?
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ื”ืื ืืชื” ื™ื›ื•ืœ ืœืืฉืจ, ื›ืจื™ืก?
ื›ืจื™ืก ืื ื“ืจืกื•ืŸ: ื›ืŸ. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื›ืŸ, ื‘ืกื“ืจ. ืื ื™ ืื’ื™ื“ ืœืš ืžื”, ื›ืจื™ืก:
09:53
Chris Anderson: Yes.
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09:54
AB: I'll tell you what, Chris:
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ื›ืœ ืขื•ื“ ื™ืฉ ืœืš ืืช ื”ืœื•ื— ืฉื ื” ืžื•ื ื— ืœืคื ื™ืš
09:55
as long as you have that book in front of you,
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09:57
do me a favor, turn to a year outside of the 1900s,
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ืชืขืฉื” ืœื™ ื˜ื•ื‘ื”, ืชืขื‘ื•ืจ ืœืฉื ื” ืฉืื™ื ื” ื‘ื˜ื•ื•ื— ืฉืœ 1900
10:01
either into the 1800s or way into the 2000s --
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ื ื’ื™ื“ 1800 ื•...ืื• ืงื“ื™ืžื” ืœ 2000 ื•..
10:04
that'll be a much greater challenge for me.
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ื–ื” ื™ื”ื™ื” ืืชื’ืจ ื’ื“ื•ืœ ื™ื•ืชืจ ืขื‘ื•ืจื™
10:06
AB: What year would you like? CA: 1824.
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ืื™ื–ื• ืฉื ื”, ื›ืจื™ืก, ืืชื” ืจื•ืฆื”?
ื›ืจื™ืก ืื ื“ืจืกื•ืŸ: 1824
10:08
AB: 1824, OK.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 1824. ื˜ื•ื‘
10:11
AB: And what month?
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ื•ืื™ื–ื” ื—ื•ื“ืฉ? ื›ืจื™ืก ืื ื“ืจืกื•ืŸ: ื™ื•ื ื™
10:13
CA: June.
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ืžื” ื‘ื™ื•ื ื™? ื›ืจื™ืก ืื ื“ืจืกื•ืŸ: ื”ืฉื™ืฉื™
10:14
AB: June what? CA: Sixth.
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10:15
AB: Was that a Sunday?
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ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื”ืฉื™ืฉื™ - ื”ืื ื”ื™ื” ื–ื” ื™ื•ื ืจืืฉื•ืŸ?
10:17
CA: It was. AB: And it was cloudy.
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ื›ืจื™ืก ืื ื“ืจืกื•ืŸ: ืื›ืŸ ื›ืŸ. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื•ื”ื™ื” ืžืขื•ื ืŸ ื—ืœืงื™ืช
10:19
(Laughter)
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10:20
Good, thank you very much.
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ื˜ื•ื‘, ืชื•ื“ื” ืจื‘ื” ืœื›ื
10:22
(Applause)
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[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
10:27
(Applause ends)
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10:28
But I'd like to wrap things up now
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ืื ื™ ืจื•ืฆื” ืœืกื›ื ื“ื‘ืจื™ื
10:30
by alluding to something from earlier in the presentation.
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ื•ืœื—ื–ื•ืจ ืœืžืฉื”ื•
ืžื•ืงื“ื ื™ื•ืชืจ ืžื”ื”ื•ืคืขื”
10:35
There was a gentleman up here who had a 10-digit calculator.
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ื”ื™ื” ื›ืืŸ ืขืœ ื”ื‘ืžื” ืื“ื•ืŸ ืขื ืžื—ืฉื‘ื•ืŸ ืขื ืชืฆื•ื’ื” ืฉืœ 10 ืกืคืจื•ืช
10:38
Where is he, would you stand up,
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ืื™ืคื” ื”ื•ื, ื”ืื ืืชื” ื™ื›ื•ืœ ืœืงื•ื?
10:41
10-digit guy?
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ื”ื‘ื—ื•ืจ ืขื 10 ื”ืกืคืจื•ืช?
10:44
OK, stand up for me just for a second,
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ื˜ื•ื‘, ื‘ื‘ืงืฉื” ืชืงื•ื ืœืจื’ืข
10:47
so I can see where you are.
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ื›ื“ื™ ืฉืื•ื›ืœ ืœืจืื•ืช ื”ื™ื›ืŸ ืืชื” ื ืžืฆื
10:49
You have a 10-digit calculator, sir, as well?
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ื‘ืกื“ืจ, ืื”, ื‘ืกื“ืจ - ื’ื ืœืš ื™ืฉ ืžื—ืฉื‘ื•ืŸ ืขื ืชืฆื•ื’ื” ืฉืœ 10 ืกืคืจื•ืช ืื“ื•ื ื™?
10:52
OK, what I'm going to try and do, is to square in my head
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ื‘ืกื“ืจ, ืžื” ืฉืื ื™ ื”ื•ืœืš ืœื ืกื•ืช ืœืขืฉื•ืช ื–ื” ืœื—ืฉื‘ ื‘ืจืืฉื™
10:55
a five-digit number requiring a 10-digit calculator.
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ืืช ื”ืจื™ื‘ื•ืข ืฉืœ ืžืกืคืจ ื‘ืŸ ื—ืžืฉ ืกืคืจื•ืช ืœื›ืš ื ื“ืจืฉ ืžื—ืฉื‘ื•ืŸ ืขื ืชืฆื•ื’ื” ืฉืœ 10 ืกืคืจื•ืช
10:59
But to make my job more interesting for you, as well as for me,
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ืื‘ืœ ื›ื“ื™ ืœืขืฉื•ืช ืืช ื”ืขื‘ื•ื“ื” ืฉืœื™ ื™ื•ืชืจ ืžืขื ื™ื™ื ืช ืขื‘ื•ืจื›ื ื›ืžื• ื’ื ืขื‘ื•ืจื™
11:04
I'm going to do this problem thinking out loud.
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ืื ื™ ื”ื•ืœืš ืœืขืฉื•ืช ืืช ื”ื—ื™ืฉื•ื‘
ื›ืฉืื ื™ ื—ื•ืฉื‘ ื‘ืงื•ืœ ืจื
11:08
So you can actually, honestly hear
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ื›ืš ืฉืœืžืขืฉื” ื•ื‘ื›ื ื•ืช, ืชื•ื›ืœื• ืœืฉืžื•ืข
11:10
what's going on in my mind while I do a calculation of this size.
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ืžื” ืงื•ืจื” ื‘ืชื•ืš ื”ืžื•ื— ืฉืœื™
ื‘ื–ืžืŸ ืฉืื ื™ ืขื•ืฉื” ื—ื™ืฉื•ื‘ ื‘ืงื ื” ืžื™ื“ื” ื›ื–ื”
11:15
Now, I have to apologize to our magician friend Lennart Green.
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ืขื›ืฉื™ื•, ืื ื™ ืฆืจื™ืš ืœื”ืชื ืฆืœ ื‘ืคื ื™ ื—ื‘ืจื ื• ื”ืงื•ืกื ืœื ืืจื˜ ื’ืจื™ืŸ
11:18
I know as a magician we're not supposed to reveal our secrets,
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ืื ื™ ื™ื•ื“ืข ืฉื‘ืชื•ืจ ืงื•ืกืžื™ื ืื ื—ื ื• ืœื ืืžื•ืจื™ื ืœื—ืฉื•ืฃ ืืช ื”ืกื•ื“ื•ืช ืฉืœื ื•
11:22
but I'm not too afraid
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ืื‘ืœ ืื ื™ ืœื ืžืžืฉ ืžืคื—ื“ ืฉืื ืฉื™ื
11:23
that people are going to start doing my show next week, so --
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ื™ืชื—ื™ืœื• ืœืขืฉื•ืช ืืช ื”ื”ื•ืคืขื” ืฉืœื™ ื‘ืฉื‘ื•ืข ื”ื‘ื
11:26
I think we're OK.
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ื›ืš ืฉืื ื™ ื—ื•ืฉื‘ ืฉื–ื” ื‘ืกื“ืจ
11:27
(Laughter)
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11:29
(Applause)
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11:30
So, let's see,
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ืื– ื‘ื•ืื• ื ืจืื”, ื‘ื•ืื• ื ื™ืงื—..
11:32
let's take a different row of people, starting with you.
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ื‘ื•ื ื ื™ืงื— ืฉื•ืจื” ืื—ืจืช ืฉืœ ืื ืฉื™ื, ื•ื ืชื—ื™ืœ ืื™ืชืš
11:35
I'll get five digits: one, two, three, four.
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ืื ื™ ืืงื‘ืœ ื—ืžืฉ ืกืคืจื•ืช: 1, 2, 3, 4 -
11:38
Oh, I did this row already.
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ืื”, ื›ื‘ืจ ืขืฉื™ืชื™ ืืช ื”ืฉื•ืจื” ื”ื–ื•. ื‘ื•ืื• ื ืขืฉื” ืืช ื”ืฉื•ืจื” ืœืคื ื™ืš
11:39
Let's do the row before you,
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11:40
starting with you: one, two, three, four, five.
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ื ืชื—ื™ืœ ืื™ืชืš ืื“ื•ื ื™: 1, 2, 3, 4, 5.
11:43
Call out a single digit --
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ื›ืœ ืื—ื“ ื™ืงืจื ืกืคืจื” ืื—ืช โ€“ ื–ื” ื™ื”ื™ื” ื”ืžืกืคืจ ื‘ืขืœ ื—ืžืฉืช ื”ืกืคืจื•ืช
11:44
that will be the five-digit number that I will try to square, go ahead.
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ืื•ืชื• ืื ืกื” ืœื”ืขืœื•ืช ื‘ืจื™ื‘ื•ืข. ืงื“ื™ืžื”
ืงื”ืœ:5. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 5
11:49
Five.
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11:50
Seven.
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ืงื”ืœ: 7. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 7
ืงื”ืœ: 6. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 6
11:52
Six.
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ืงื”ืœ: 8. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 8
11:53
Eight.
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11:54
Three.
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ืงื”ืœ: 3. ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: 3
11:56
57,683 --
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57,683 ื‘ืจื™ื‘ื•ืข
12:00
squared.
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12:01
Yuck.
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ืื™ื›ืก
12:03
Let me explain to you how I'm going to attempt this problem.
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ืชื ื• ืœื™ ืœื”ืกื‘ื™ืจ ืœื›ื ืื™ืš
ืื ื™ ื”ื•ืœืš ืœื ืกื•ืช ื•ืœืคืชื•ืจ ืืช ื”ื‘ืขื™ื” ื”ื–ื•
12:08
I'm going to break the problem down into three parts.
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ืื ื™ ื”ื•ืœืš ืœืคืจืง ืืช ื”ื‘ืขื™ื” ืœืฉืœื•ืฉื” ื—ืœืงื™ื
12:11
I'll do 57,000 squared,
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ืื ื™ ืื—ืฉื‘ 57,000 ื‘ืจื™ื‘ื•ืข
12:13
plus 683 squared,
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ื•ืขื•ื“ 683 ื‘ืจื™ื‘ื•ืข
12:17
plus 57,000 times 683 times two.
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ื•ืขื•ื“ 57,000 ื›ืคื•ืœ 683
ื›ืคื•ืœ 2
12:22
Add all those numbers together,
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ืื—ื‘ืจ ืืช ื›ืœ ื”ืžืกืคืจื™ื ื”ืืœื” ื™ื—ื“ื™ื•
12:24
and with any luck, arrive at the answer.
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ื•ืขื ืงืฆืช ืžื–ืœ, ืื’ื™ืข ืœืชืฉื•ื‘ื”
12:28
Now, let me recap.
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ืขื›ืฉื™ื•, ืชื ื• ืœื™ ืœื›ืกื•ืช
12:30
(Laughter)
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12:31
Thank you.
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ืชื•ื“ื” ืœื›ื
12:32
(Laughter)
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12:34
While I explain something else --
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ื•ืœื”ืกื‘ื™ืจ ื“ื‘ืจ ื ื•ืกืฃ
12:36
(Laughter)
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12:37
-- I know, that you can use, right?
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ืื ื™ ื™ื•ื“ืข, ื‘ื–ื” ืืชื” ื™ื›ื•ืœ ืœื”ืฉืชืžืฉ, ื ื›ื•ืŸ?
12:39
(Laughter)
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1005
12:40
While I do these calculations,
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ื‘ื–ืžืŸ ืฉืื ื™ ืขื•ืฉื” ืืช ื”ื—ื™ืฉื•ื‘
12:42
you might hear certain words,
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ื™ืชื›ืŸ ื•ืชืฉืžืขื• ืžื™ืœื™ื ืžืกื•ื™ืžื•ืช
ื•ืœื ืžืกืคืจื™ื, ืžืกืชื ื ื•ืช ืœืชื•ืš ื”ื—ื™ืฉื•ื‘
12:45
as opposed to numbers, creep into the calculation.
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12:48
Let me explain what that is.
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ืชื ื• ืœื™ ืœื”ืกื‘ื™ืจ ืžื” ื–ื”
12:49
This is a phonetic code,
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ื–ื”ื• ืงื•ื“ ื”ืžืจื”
12:51
a mnemonic device that I use,
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ื–ื•ื”ื™ ืฉื™ื˜ื” ืœื–ื™ื›ืจื•ืŸ ื‘ื” ืื ื™ ืžืฉืชืžืฉ
12:53
that allows me to convert numbers into words.
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ื”ืžืืคืฉืจืช ืœื™ ืœื”ืžื™ืจ ืžืกืคืจื™ื ืœืžื™ืœื™ื
12:56
I store them as words, and later on retrieve them as numbers.
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ืื ื™ ืžืื—ืกืŸ ืืช ื”ืžืกืคืจื™ื ื‘ืชื•ืจ ืžื™ืœื™ื, ื•ืžืื•ื—ืจ ื™ื•ืชืจ ืžืฉื™ื‘ ืื•ืชื ื›ืžืกืคืจื™ื
12:59
I know it sounds complicated; it's not.
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. ืื ื™ ื™ื•ื“ืข ืฉื–ื” ื ืฉืžืข ืžืกื•ื‘ืš, ื–ื” ืœื
13:01
I don't want you to think you're seeing something out of "Rain Man."
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ืื ื™ ืคืฉื•ื˜ ืœื ืจื•ืฆื” ืฉืชื—ืฉื‘ื• ืฉืืชื ืจื•ืื™ื ืžืฉื”ื• ืžื”ืกืจื˜ "ืื™ืฉ ื”ื’ืฉื"
[ืฆื—ื•ืง]
13:05
(Laughter)
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13:06
There's definitely a method to my madness --
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ื™ืฉ ืคื” ื‘ื”ื—ืœื˜ ืฉื™ื˜ื” ื‘ืฉื™ื’ืขื•ืŸ ืฉืœื™
13:08
definitely, definitely.
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ื‘ื”ื—ืœื˜, ื‘ื”ื—ืœื˜. ืžืฆื˜ืขืจ.
13:09
Sorry.
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13:10
(Laughter)
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[ืฆื—ื•ืง]
13:14
If you want to talk to me about ADHD afterwards,
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ืื ืืชื ืจื•ืฆื™ื ืœื“ื‘ืจ ืื™ืชื™ ืขืœ ADHD (ื‘ืขื™ื•ืช ืงืฉื‘ ื•ืจื™ื›ื•ื–)
13:16
you can talk to me then.
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ืืชื ื™ื›ื•ืœื™ื ืœื“ื‘ืจ ืื™ืชื™ ืžืื•ื—ืจ ื™ื•ืชืจ. ื‘ืกื“ืจ
13:18
By the way, one last instruction,
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ื“ืจืš ืื’ื‘, ื”ื•ืจืื” ืื—ืจื•ื ื”
13:20
for my judges with the calculators --
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ืœืฉื•ืคื˜ื™ื ืฉืœื™ ืขื ื”ืžื—ืฉื‘ื•ื ื™ื, ื‘ืกื“ืจ, ืืชื ื™ื•ื“ืขื™ื ืžื™ ืืชื
13:22
you know who you are --
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ื™ืฉ ืœืคื—ื•ืช 50 ืื—ื•ื– ืกื™ื›ื•ื™
13:24
there is at least a 50 percent chance that I will make a mistake here.
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ืฉืื ื™ ืื˜ืขื”
13:29
If I do, don't tell me what the mistake is;
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ืื ืื ื™ ื˜ื•ืขื”, ืืœ ืชื’ื™ื“ื• ืœื™ ืžื” ื”ื™ื ื”ื˜ืขื•ืช
13:32
just say, "you're close," or something like that,
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ืจืง ืื™ืžืจื•, "ืืชื” ืงืจื•ื‘", ืื• ืžืฉื”ื• ื›ื–ื”, ื•ืื ื™ ืื ืกื” ืœื”ื‘ื™ืŸ ื•ืœื”ื’ื™ืข ืœืชืฉื•ื‘ื”
13:34
and I'll try and figure out the answer --
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ื–ื” ื™ื›ื•ืœ ืœื”ื™ื•ืช ื“ื™ ืžืฉืขืฉืข ื‘ืคื ื™ ืขืฆืžื•
13:36
which could be pretty entertaining in itself.
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13:39
If, however, I am right,
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ืื, ืœืขื•ืžืช ื–ืืช, ืื ื™ ืขื•ื ื” ื ื›ื•ืŸ
13:41
whatever you do, don't keep it to yourself, OK?
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ืžื” ืฉืœื ื™ื”ื™ื” ืืœ ืชืฉืžืจื• ื–ืืช ืœืขืฆืžื›ื, ื‘ืกื“ืจ?
13:44
(Laughter)
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[ืฆื—ื•ืง]
13:45
Make sure everybody knows that I got the answer right,
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ื•ื“ืื• ืฉื›ื•ืœื ื™ื“ืขื• ืฉืขื ื™ืชื™ ื ื›ื•ืŸ
ื•ื‘ื–ื” ืืกื™ื™ื ื‘ื’ื“ื•ืœ, ื‘ืกื“ืจ
13:48
because this is my big finish, OK.
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13:50
So, without any more stalling,
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ืื– ืœืœื ืขื™ืงื•ื‘ื™ื ื ื•ืกืคื™ื
13:53
here we go.
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ื”ื ื” ืื ื™ ืžืชื—ื™ืœ
13:56
I'll start the problem in the middle, with 57 times 683.
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ืื ื™ ืืชื—ื™ืœ ืืช ื”ื‘ืขื™ื” ืžื”ืืžืฆืข ืขื 57 ื›ืคื•ืœ 683
ืขื›ืฉื™ื•, 57 ื›ืคื•ืœ 68 ื–ื” 3400, ื•ืขื•ื“ 476 ื–ื” 3,876
13:59
57 times 68 is 3,400, plus 476 is 3876,
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ืฉื–ื” 38,760 ื•ืขื•ื“ 171
14:02
that's 38,760 plus 171,
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14:04
38,760 plus 171 is 38,931.
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38,760 ื•ืขื•ื“ 171 ื–ื” 38,931
14:07
38,931; double that to get 77,862.
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ืืช 38,931 ืžื›ืคื™ืœื™ื ืคื™ 2 ื›ื“ื™ ืœืงื‘ืœ 77,862
14:11
77,862 becomes cookie fission,
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77,862 ื”ื•ืคืš ืœื—ืชื™ื›ืช ืขื•ื’ื™ื™ื”
14:13
cookie fission is 77,822.
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ื—ืชื™ื›ืช ืขื•ื’ื™ื™ื” ื–ื” 77.822
14:17
That seems right, I'll go on. Cookie fission, OK.
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ื–ื” ื ืจืื” ื‘ืกื“ืจ, ืื ื™ ืžืžืฉื™ืš. ื—ืชื™ื›ืช ืขื•ื’ื™ื™ื”, ื‘ืกื“ืจ
14:19
Next, I do 57 squared, which is 3,249, so I can say,
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ืขื›ืฉื™ื• ืื ื™ ืžืขืœื” 57 ื‘ืจื™ื‘ื•ืข, ืฉื–ื” 3,249 ื›ืš ืฉืื ื™ ื™ื›ื•ืœ ืœื•ืžืจ
14:23
three billion.
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ืฉืœื•ืฉื” ืžื™ืœื™ืืจื“. ืงื— ืืช 249 ื•ื”ื•ืกืฃ ืœืขื•ื’ื™ื™ื”
14:25
Take the 249, add that to cookie, 249,
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14:28
oops, but I see a carry coming --
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ืื•ืคืก ืื‘ืœ ืื ื™ ืจื•ืื” ื”ืขื‘ืจื” ืžืชืงืจื‘ืช....
14:30
249 --
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249
14:32
add that to cookie, 250 plus 77,
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ืชื•ืกื™ืฃ ืืช ื–ื” ืœืขื•ื’ื™ื™ื”, 250 ื•ืขื•ื“ 77
14:34
is 327 million --
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ื–ื” 327 ืžื™ืœื™ื•ืŸ
14:38
fission, fission, OK, finally, we do 683 squared,
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ื—ืชื•ืš ื—ืชื•ืš, ื‘ืกื“ืจ, ืœืกื™ื•ื ืขื•ืฉื™ื 683 ื‘ืจื™ื‘ื•ืข
14:41
that's 700 times 666, plus 17 squared
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ืฉื–ื” 700 ื›ืคื•ืœ 666, ื•ืขื•ื“ 17 ื‘ืจื™ื‘ื•ืข
14:43
is 466,489, rev up if I need it,
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ืฉื–ื” 466,489, ืœื”ืื™ืฅ ืื ืื ื™ ืฆืจื™ืš ืืช ื–ื”
14:46
rev up, take the 466,
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ืœื”ืื™ืฅ, ืงื— ืืช 466
14:48
add that to fission, to get,
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ืœื”ื•ืกื™ืฃ ื—ืชื™ื›ื”, ื›ื“ื™ ืœืงื‘ืœ
ืื•ื™ ื•ื™ื™
14:51
oh gee --
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14:53
328,489.
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4388
328,489
14:58
Audience: Yeah! AB: Good.
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ืงื”ืœ: ื›ืŸ!
ืืจืชื•ืจ ื‘ื ื’'ืžื™ืŸ: ื˜ื•ื‘
15:00
Thank you very much.
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[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
15:01
(Applause)
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ืชื•ื“ื” ืจื‘ื” ืœื›ื
15:03
I hope you enjoyed mathemagics.
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ืื ื™ ืžืงื•ื•ื” ืฉื ื”ื ื™ืชื "ืžืžื˜ืžื˜ื™ืงืกื", ืชื•ื“ื” ืœื›ื
15:04
Thank you.
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15:05
(Applause)
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[ืžื—ื™ืื•ืช ื›ืคื™ื™ื]
ืขืœ ืืชืจ ื–ื”

ืืชืจ ื–ื” ื™ืฆื™ื’ ื‘ืคื ื™ื›ื ืกืจื˜ื•ื ื™ YouTube ื”ืžื•ืขื™ืœื™ื ืœืœื™ืžื•ื“ ืื ื’ืœื™ืช. ืชื•ื›ืœื• ืœืจืื•ืช ืฉื™ืขื•ืจื™ ืื ื’ืœื™ืช ื”ืžื•ืขื‘ืจื™ื ืขืœ ื™ื“ื™ ืžื•ืจื™ื ืžื”ืฉื•ืจื” ื”ืจืืฉื•ื ื” ืžืจื—ื‘ื™ ื”ืขื•ืœื. ืœื—ืฅ ืคืขืžื™ื™ื ืขืœ ื”ื›ืชื•ื‘ื™ื•ืช ื‘ืื ื’ืœื™ืช ื”ืžื•ืฆื’ื•ืช ื‘ื›ืœ ื“ืฃ ื•ื™ื“ืื• ื›ื“ื™ ืœื”ืคืขื™ืœ ืืช ื”ืกืจื˜ื•ืŸ ืžืฉื. ื”ื›ืชื•ื‘ื™ื•ืช ื’ื•ืœืœื•ืช ื‘ืกื ื›ืจื•ืŸ ืขื ื”ืคืขืœืช ื”ื•ื•ื™ื“ืื•. ืื ื™ืฉ ืœืš ื”ืขืจื•ืช ืื• ื‘ืงืฉื•ืช, ืื ื ืฆื•ืจ ืื™ืชื ื• ืงืฉืจ ื‘ืืžืฆืขื•ืช ื˜ื•ืคืก ื™ืฆื™ืจืช ืงืฉืจ ื–ื”.

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