Measure by Hourglass

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?




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Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
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Calculate the number of legs standing on the floor.

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Heat or Cold ?

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Gambling

In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.