Can you solve the magical maze riddle? - Alex Rosenthal

711,927 views ・ 2024-02-27

TED-Ed


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翻译人员: Sammi Wang 校对人员: Lexi Ding
00:07
Today is the annual Sly Wizard Tournament featuring competitors
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今天是一年一度的狡猾巫师锦标赛,
00:11
from the wizarding world’s three greatest schools,
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参赛选手来自巫师界的 三大魔法学校,
00:13
and you’ve been entrusted with an enormous responsibility.
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而你被赋予了巨大的责任。
00:17
You are to administer the tournament.
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你负责组织这场比赛。
00:19
First, you and you alone will determine how many events there will be
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首先,你一个人要决定举办多少赛项
00:23
and their scoring system.
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及其对应的计分系统。
00:25
Then the three wizards will enter your maze
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然后,三位巫师将进入你的迷宫
00:28
and compete in your chosen events in utmost secrecy;
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极秘密地参与你设定的赛项;
00:32
only you and they will see what happens.
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只有你和他们自己知道发生的一切。
00:35
The competition begins and...
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比赛开始了……
00:38
Wow, that was one for the record books.
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哇,这真是创纪录的一次比赛。
00:40
The winner was... wait, you have no idea.
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赢家是……等等,你并不知道是谁。
00:45
The last thing you remember was a dark wizard showing up
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你记得的最后一件事 是一个黑巫师出现
00:48
and casting a forgetting curse.
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并施了个遗忘诅咒。
00:51
The competitors seem even more confused— each is convinced they won.
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三位参赛选手似乎更加困惑—— 他们每个人都确信是自己赢了。
00:56
This is bad.
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太糟糕了。
00:57
There can be no do-overs,
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比赛没法重来,
00:59
and the last failure to declare a winner set off the first Great Wizarding War.
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上一场没有成功判定输赢的比赛 可是引发了第一次巫师大战。
01:05
You’ve got to figure this out— and fast.
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你必须搞定这件事——还得尽快。
01:07
But for the life of you, you can’t remember a thing.
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但你却怎么都记不起来。
01:10
You know you had to follow a few rules:
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你知道一些比赛规则:
01:13
there had to be three or more events, each with a single winner and loser.
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当时有三个以上的赛项, 每项只有一个赢家和一个输家。
01:17
Every event used the same scoring system,
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所有赛项的计分系统都一样,
01:20
where first place received more points than second,
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第一名获得的分数比第二名多,
01:23
and second more than third.
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第二名获得的分数比第三名多。
01:25
All points were positive integers.
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所有分数均为正整数。
01:28
Maybe there’s a record somewhere... oh, of course, your scorecard.
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也许某个地方有分数记录…… 哦,对了,你手里的记分卡。
01:32
Well, that leaves something to be desired.
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嗯,这还不够。
01:34
All that you wrote down was that in Calchemy,
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你只写下了在炼金术比赛中,
01:37
Newt-niz won, Leib-ton took second,
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纽特·尼兹获胜, 里伯·顿获得第二名,
01:40
and that was the only time Magnificent Marigold’s Magical Macademy
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而这也是华丽万寿菊魔法学院
01:44
got third all day.
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全天唯一一次获得第三名。
01:46
Oh, and some final scores:
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哦,还有总分:
01:48
one school got 22 points, and both of the others got 9.
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一所学校获得了 22 分, 其他两所各获得了 9 分。
01:53
Why are you so bad at taking notes?!
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你怎么这么不擅长记分呢?!
01:56
No time for self-recrimination.
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没时间自责了。
01:58
The wizarding world is waiting.
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整个巫师界都在等待。
02:00
Who won the tournament?
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到底是谁赢了比赛?
02:01
Pause here to figure it out yourself. Answer in 3
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暂停三秒,尝试自己算清楚。
02:04
Answer in 2
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还有两秒
02:06
Answer in 1
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最后一秒
02:09
At first, it may seem like there are an overwhelming number
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一开始,比赛分数似乎有很多种
02:12
of possible scoring systems,
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可能的组成形式,
02:14
so let's see if we can narrow our options.
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所以我们先看看能不能缩小范围。
02:16
We can start by looking for clues in the total scores.
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我们可以先在总分中寻找线索。
02:20
Every event was scored the same way,
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每项赛事的计分方式相同,
02:23
so the sum of all points in the entire tournament
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所以整个比赛中所有积分的总和
02:25
must be a multiple of one event’s total.
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一定是某项赛事总分的倍数。
02:29
In other words, if there were three events that scored 3, 2, 1,
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换句话说,如果有三项比赛, 第一到三名得分为 3、2、1,
02:33
which adds up to 6, the total points for the day would be 18,
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加起来一共 6 分, 那么比赛当天的总分为 18 分,
02:37
which is three events times 6 points.
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也就是三项赛事乘以 6。
02:40
Our total is 40.
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已知此次比赛的总分是 40。
02:42
So we can make a table of possibilities: one event totaling 40 points,
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因此,我们可以列出可能的情况: 只有一项比赛,则该项总分为 40,
02:47
two totaling 20, four totaling 10, and so on.
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两项则每项比赛总分为 20, 四项则每项 10 分,以此类推。
02:51
We know there were at least three events, which eliminates these options,
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我们知道至少有三项比赛 因此可以排除这些可能,
02:56
and we can also get rid of events with fewer than 6 points,
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单项比赛总分小于 6 的也可以排除,
02:59
because the smallest possible total is 3 plus 2 plus 1.
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因为单项比赛总分 最少为 3 加 2 加 1。
03:03
That leaves two prospects.
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就剩两个选择了。
03:05
Let’s try to narrow those further by breaking down the possible points
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我们尝试通过细分 每项赛事中可能的分数组合
03:09
earned in each event:
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来进一步缩小范围:
03:11
if first place received 7 points,
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如果第一名得 7 分,
03:13
the teams that had totals of 9 couldn’t have won an event
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那么总分为 9 的队伍 一项比赛都没赢过,
03:17
because their total score would be 10 or more.
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否则他们的总分 将达到 10 分以上。
03:20
That means the team with 22 would have to have won all four.
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这意味着获得 22 分的队伍 赢了全部四场比赛。
03:24
But then their total would be 28, so we can eliminate that option.
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但这样的话,他们的总分应该是 28, 因此我们可以排除这种可能。
03:28
And with four events, these numbers can't be made to add up to 22.
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而且如果一共四项比赛, 这些数字加起来都不等于 22。
03:32
Finally, if first place got 5 points,
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最后,如果第一名得 5 分,
03:35
the highest possible score with four events would be 20,
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那么四项比赛都赢了 也只能获得 20 分,
03:39
getting rid of these two as well.
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所以这两种可能也可以排除。
03:41
In fact, five events scoring 4 each could only reach 20 as well.
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如果有五项比赛,赢一项得 4 分, 那么总分也只有 20 分。
03:46
That leaves us with just one possibility:
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那么就剩一种可能了:
03:49
five events each scored 5, 2, 1.
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五项比赛的第一到三名 获得的分数分别为 5、2、1 。
03:53
There’s exactly one way to make those scores add up to 22:
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只有一种情况下 这些分数加起来为 22 分:
03:57
the winner finished first four times and second once.
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获胜者获得第一名四次, 获得第二名一次。
04:01
The scores of 9 mean one team won once and lost four times,
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总分 9 分的一支队伍 赢过一次,输了四次
04:06
and the other lost once and took second four times.
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另一队输了一次,获得第二名四次。
04:10
That must be Marigold’s Macademy,
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这支队伍一定是华丽万寿菊,
04:12
whose only third place finish was Calchemy based on your note.
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根据你的记录,他们唯一一次第三名 是在炼金术比赛中获得的。
04:17
And Leib-ton’s second place finish in Calchemy means they scored 22
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而里伯·顿在炼金术中获得第二名 意味着他们总分为 22 分,
04:22
and won the Sly Wizard Tournament.
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赢得了狡猾巫师锦标赛。
04:24
You have just enough evidence to prove it, keep your job, and avert war.
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你的证据刚好足以证明这一点, 你保住了工作,也避免了一场战争。
04:29
Phew!
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呼!
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