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标题: Balance scale question [打印本页]

作者: ob 时间: 2004-11-3 04:29
标题: Balance scale question

An old tea merchant in New York's Chinatown was trying to figure out how to divide 20 pounds of tea into 2-pound packets using a simple balance scale. But this merchant could only find two weights around the shop - one was 5 pounds and the other was 9 pounds.

Can you figure out how he did it?

作者: Jenny 时间: 2004-11-3 19:25
标题: Balance scale ---是天平吗？

Balance scale ---是天平吗？

作者: ob 时间: 2004-11-3 19:52
标题: Yes

Yes

作者: Jenny 时间: 2004-11-3 21:08
标题: 那就容易了。

9=5+4

2=2

作者: ob 时间: 2004-11-3 22:21
标题: Good[:)]

A minor change make it easy to understand:

1=5+5-9

1+1=2

2=2

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