2015年Bebras挑战练习题-Beaver the Alchemist(炼金术士海狸)

Beaver the Alchemist can convert objects into new objects. He can convert:

炼金术士海狸能够将物品转换成新的物品。他可以转换:

  • Two clovers into a coin两片三叶草变成一枚硬币
  • A coin and two clovers into a ruby一枚硬币和两片三叶草变成了一颗红宝石
  • A ruby and a clover into a crown将一颗红宝石和一株三叶草制成一顶王冠
  • A coin, a ruby, and a crown into a kitten.一枚硬币、一颗红宝石和一顶王冠变成了一只小猫。

After an object has been converted into another object, it disappears immediately.一个物体在被转换成另一个物体之后,会立刻消失。

2015年Bebras挑战练习题-Beaver the Alchemist(炼金术士海狸)

Question: 问题:

How many clovers does Beaver the Alchemist need to create one kitten?炼金术士海狸要创造一只小猫需要多少株三叶草?

A. 5

B. 10

C. 11

D. 12

 

 

 

 

 

Explanation 解释

The answer is 11. We can see the conversion as follows:

答案是 11。我们可以看到转换过程如下:

coin       =   2 clovers

ruby      =   2 clovers + 1 coin = 4 clovers

crown    =   1 ruby + 1 clover = 4 clovers + 1 clovers = 5 clovers

kitten    =   1 coin + 1 ruby + 1 crown = 2 clovers + 4 clovers + 5 clovers = 11 clovers

The answer 5 is for those who did not read the graph properly to realize that we need 2 clovers to create a coin or ruby, or for those who did not realize that you need a coin to create a ruby or a ruby to create a crown.

答案 5 是给那些没有正确读图从而没有意识到需要 2 片三叶草才能合成一枚硬币或一颗红宝石的人,或者是那些没有意识到需要一枚硬币才能合成一颗红宝石,或者需要一颗红宝石才能合成一顶王冠的人。

The answer 10 is for those who think that the number of clovers is the same as the number of edges.

答案 10 是给那些认为三叶草的数量与边的数量相同的那些人的。

The answer 12 is for those who miscounted.

答案 12 是给那些数错的人的。

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