7道超级经典的益智题

apollochil · 发表于 2011-9-16 11:36 PM

silicon_beaver · 发表于 2011-9-17 12:12 AM

1. answer: each take 1/4. and connect two pieces together.

silicon_beaver · 发表于 2011-9-17 12:15 AM

Oops. just see the answer at bottom.

Kami · 发表于 2011-9-17 04:55 AM

1. burn one stick simultaneously from the two ends, and concurrently burn the other stick only from one end. After stick A is burned out (shoud be half an hour), burn stick B from the other end. The time from stick A is burned out till stick B is burned out should be 15 minutes.

Kami · 发表于 2011-9-17 05:02 AM

3. The $2 should be deducted from $27. The three spent $27, owner gets $25, worker gets $2.

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[百家杂谈] 7道超级经典的益智题

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