On the surface of the planet lives a vampire , that can move with the speed not greater than u. A vampire slayer spaceship approaches to the planet with its speed v. As soon as the spaceship sees the vampire it shots a silver bullet - the vampire is dead. Prove that if v/u > 10 , the vampire slayer can accomplish his mission, even the vampire is trying to hide.
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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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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 spo...
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