Different configurations of springs have different elasticity constants. Which one is impossible?
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Although some games look similar, the probabilities of winning them aren't always the same. Is it the case in today's challenge?
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Solve this Calcdoku puzzle using careful logic and attention to the properties of arithmetic.
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Each time the ball bounces up, it loses some percentage of its energy. What percentage?
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By extending the sides of regular polygons, we can create interesting star patterns. What happens when we start shading them?
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By surveying a carefully chosen sample, one can draw conclusions about a larger group. How big must the sample be?
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In a jigsaw map, you must arrange puzzle pieces according to clues. How do these pieces fit together?
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