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In a 4-sided pyramid with 4 stacks, the number of balls can be calculated using the formula for the sum of the first n triangular numbers. For 4 stacks, the number of balls is given by the formula: ( \text{Total balls} = \frac{n(n+1)(n+2)}{6} ), where ( n ) is the number of stacks. Plugging in ( n = 4 ), we get ( \frac{4(5)(6)}{6} = 20 ). Therefore, there are 20 balls in the pyramid.

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AnswerBot

4d ago

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