20、 Obama
B1 中級 米 150 タグ追加 保存
このエントリーをはてなブックマークに追加
動画の字幕をクリックしてすぐ単語の意味を調べられます！
単語帳読み込み中…
字幕の修正報告
After months of travel, you've arrived at Duonia,
home to the famous temple that's the destination of your pilgrimage.
Entering from the northwest,
you pass through the city gates and the welcome center,
where you're given a map and a brochure.
The map reveals that the town consists of 16 blocks,
formed by five streets that run west to east,
intersecting five more that run north to south.
You're standing on the northernmost street facing east,
with the two blocks containing the gate and the welcome center behind you.
The temple's only entrance lies at the very southeast corner.
It's not a long walk, but there's a problem.
As you learn from the brochure,
Duonia imposes a unique tax on all visitors,
which must be paid when they arrive at their destination within the city.
The tax begins at zero,
increases by two silver for every block you walk east,
and doubles for every block you walk south.
However, a recent reform to make the tax fairer
halves your total bill for every block you walk north
and subtracts two silver for every block you walk west.
Just passing through the gate and the welcome center
means you already owe four silver.
As a pilgrim you carry no money and have no way of earning any.
What's more, the rules of your pilgrimage forbid you
from walking over any stretch of ground more than once during your journey—
though you can cross your own path.
Can you figure out a way to reach the temple without owing any tax
or walking the same block twice in any direction?
Pause here if you want to figure it out for yourself.
Answer in: 3
Answer in: 2
Answer in: 1
You look at the map to consider your options.
Walking towards the temple always increases the tax,
and walking away decreases it,
so it seems like you can never reach it without owing silver.
But what happens when you walk around a single block?
If you start out owing four silver and go clockwise starting east,
your tax bill becomes six,
then 12,
then 10,
then five.
If you looped again, you'd owe seven,
14,
12,
and six.
It seems that each clockwise loop leaves you owing one extra silver.
What about a counterclockwise loop then?
Starting owing four again and going south first,
your bill changes to eight,
10,
five,
and three.
Looping again you'd owe six,
eight,
four,
and two.
Each counterclockwise loop actually earns you one silver.
That's because any tax doubled,
plus two,
halved,
and minus two,
always ends up one smaller than it started.
The key here is that while the different taxes for opposite directions
may seem to balance each other out,
the order in which they're applied makes a huge difference.
You start off owing four silver,
so four counterclockwise loops would get you down to zero.
Unfortunately, it's not that simple, since you can't walk the same block twice.
But there's another way to reduce your bill:
walking one large counterclockwise loop through the city.
From your starting position, walk three blocks south.
You need to leave the southernmost street clear for the final stretch,
so continuing counterclockwise means going east.
Walk two blocks to the eastern wall and you owe a whopping 36 silver.
But now you can start reducing your bill.
Three blocks north and one block west cuts it to 2.5.
You can't go west from here —that would leave you with no way out.
So you go one block south, and the remaining three blocks west,
leaving you with a debt of -1 silver.
And since doubling a negative number still gives you a negative number,
walking the three blocks to the south wall means the city owes you eight.
Fortunately, that's exactly enough
to get you through the final blocks to the temple.
As you enter, you realize what you've learned from your pilgrimage:
sometimes an indirect route is the best way to reach your destination.
コツ：単語をクリックしてすぐ意味を調べられます！

読み込み中…

B1 中級 米

【TED】税金ゼロで到着できる？ーダニエル・フィンケル (Can you solve the penniless pilgrim riddle? - Daniel Finkel)

150 タグ追加 保存
このエントリーをはてなブックマークに追加
ally.chang 2020 年 2 月 11 日 に公開

お気に入り

loading

コメント

読み込み中…
お勧め動画

  1. 1. クリック一つで単語を検索

    右側のスプリクトの単語をクリックするだけで即座に意味が検索できます。

  2. 2. リピート機能

    クリックするだけで同じフレーズを何回もリピート可能！

  3. 3. ショートカット

    キーボードショートカットを使うことによって勉強の効率を上げることが出来ます。

  4. 4. 字幕の表示/非表示

    日・英のボタンをクリックすることで自由に字幕のオンオフを切り替えられます。

  5. 5. 動画をブログ等でシェア

    コードを貼り付けてVoiceTubeの動画再生プレーヤーをブログ等でシェアすることが出来ます！

  6. 6. 全画面再生

    左側の矢印をクリックすることで全画面で再生できるようになります。

  1. クイズ付き動画

    リスニングクイズに挑戦！

  1. クリックしてメモを表示

  1. UrbanDictionary 俚語字典整合查詢。一般字典查詢不到你滿意的解譯，不妨使用「俚語字典」，或許會讓你有滿意的答案喔