Brain Teasers
How did he?
Fun: 
(2.13)
Difficulty: (1.68)
Puzzle ID: #12172
Submitted By: coolbrain2291
Corrected By: shenqiang
(2.13)
Difficulty: (1.68)
Puzzle ID: #12172
Submitted By: coolbrain2291
Corrected By: shenqiang
Trick
Trick brain teasers appear difficult at first, but they have a trick that makes them really easy.Trick
A person was looking for a yo-yo with exactly 3 1/2 feet of string. He had 1 week before a contest and had only enough money to buy 1 yo-yo. He did not open any yo-yo boxes (none were out where he could test them), it gave no measurement on the box, all of the yo-yo's were behind a glass door with a lock and he needed at least 4 days to practice. How did he find an exact measurement of the string?
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