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 logic puzzle 
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How many characters

How many characters does the right answer to this question have?

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 math puzzle 
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Letter folding

If you would fold a letter in two fifty times, how thick should the enveloppe be that can fit the letter? Assume that the thickness of a piece of paper is about 0.05 mm.

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Classic riddle

What has four legs and only one foot?

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 Last changed 24-10-2008
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