Knowing how your opponent will play in a game allows you to make the best possible move. How is this game won?
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As long as townsfolk need to cross the river, Galileo's ferry will be at their service. But can Galileo cross safely when the current is fast?
Series 4 of 4
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Looking at everything in this figure could get overwhelming. Instead, think about how it's built in steps.
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To find the median of a data set, order the values… but can you locate the median without the exact values?
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In real-life collisions, objects lose energy. How does this fact limit the height of the top ball?
Series 5 of 5
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Use a combination of logic and arithmetic to find the middle row of this Calcdoku puzzle.
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When angles appear in the same figure, their measures are related. We can use those relationships to find their exact values.
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