两个小题目

ob · 发表于 2006-6-2 09:00:12

1、过生日
　　这一天，爸爸出了一道题，想考考小刚。爸爸说：“有一对孪生兄弟，每一年都是弟弟先过生日，而哥哥后过，这是为什么？”。小刚想了一会，终于想到了。请问，你能猜到这是怎么一回事吗？
　　2、如何开枪
　　一根3厘米粗的绳子悬吊着，给你一支军用手枪和一颗直径1厘米的子弹，你怎样才能一枪就把这条完好的绳子全打断呢？注意，不能再用其他任何固体的东西。

yma16 · 发表于 2006-6-2 18:08:23

2nd: put the middle of the string into the gun.

Jenny · 发表于 2006-6-2 18:13:09

1. younger one: 01/01, older one: 12/31, in each year, from 01/01 to 12/31, so younger one has birthday first, actually older one has birthday in last year's 12/31, not in a same year.

ob · 发表于 2006-6-2 19:36:26

ob · 发表于 2006-6-2 21:12:46

How? Should the gun pipe diameter be the same as the bullet?

yma16 · 发表于 2006-6-4 02:43:46

Usually, the gun pipe diameter is about the same as the bullet. Inside the pipe, there are lines to make the bullet spin. My answer did not work since I did not read the measurements of the rope and the bullet. But if the bullet would explode when it hit the target, probably it can break the rope. My classmate when to Tian An Men around 6/4/89. Some bullets hit his surrounding and exploded and hit his body. He had many injures. Then, he was accused as a bad gay who were participating in violence.

Please post the answer later.

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