Home » Difficult Riddles » I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are w...

I am four times as old as my daughter. In 20 years time I shall be twice as old as her. How old are we now?

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I look at you, you look at me, I raise my right, you raise your left. What am I?

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The more you take away, the more I become. What am I?

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Even if they are starving, natives living in the Arctic will never eat a penguin’s egg. Why not?

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Lauren and Alice are talking long distance on the phone. Lauren is in an East-Coast US state which borders the Atlantic Ocean, and Alice is in a West-Coast state which borders the Pacific Ocean. Lauren asks Alice: “What time is it?” Alice replies and Lauren says: “That’s really odd. It’s the same time here!” How can this be?

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You are given a set of scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. How can you identify it and determine whether it is heavy or light?

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