How many places are there on earth where one could walk one mile south, then one mile west, then one mile north and end up in the same spot? Assume the earth is a solid smooth sphere.
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For her birthday, I bought my daughter a set of five nested wooden dolls, similar to those originating in China. The set appears as one do...
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1. Poor people have it. Rich people need it. If you eat it , you die. What is it? 2. If you don't keep me, I will break. 3. Take o...
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You are wearing a blindfold and thick gloves. An infinite number of quarters are laid out on a table of infinite area. 20 of these quart...
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