Brain Food: Riddle #2

March 29, 2009

Imagine that you have a plastic water bottle. It’s not filled all the way, but you think that it’s filled exactly halfway. Now here’s the question: how can you know if the water bottle is filled exactly halfway through? You can’t use any instruments like a ruler to measure and you also can’t open the cap.

Answer will be posted tomorrow.

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One Response to “Brain Food: Riddle #2”

  1. Omar said

    Oh for gods sake, it’s been killing me for days! Whats the answer! Why did you stop blogging?

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