Mental Floss 309

The answer to last week’s challenge is: Q: A man walks 2kms in heavy rain on an open road. He doesn’t have a hat, an umbrella or any other protection from the rain. Yet, for some reason he does not get wet hair. Why not?

A: The man was bald.

This week’s thinking challenge is …

Q: With a 7 minute hourglass and an 11 minute hourglass, what would be the easiest way to tell exactly when 15 minutes were up?

The answer along with a new challenge, next week.

Have an excellent weekend!

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