Mental Floss 191

The answer to last week’s challenge is, Q:You are sitting in a rowboat on a small lake. You have a brick in your boat. You toss the brick out of your boat into the lake, where it quickly sinks to the bottom. Does the water level rise slightly, drop slightly, or stay the same?

A: The water level goes down. The reason is that the mass of the brick while its in the boat displaces more water, compared to the volume of the brick when it is submerged in the water.

This week’s challenge is:

Q: What has a mouth, but cannot eat; moves, but has no legs; and has a bank, but cannot put money in it?

The answer along with a new challenge, next week.

For those with an interest in the future ….. Join us at this year’s International Conference on Thinking in Melbourne on July 4-8

Have an excellent weekend!

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