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Question

How many perfect cubes are there from 1 to 500? How many are perfect squares among these cubes?

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Solution

13 = 1

23 = 8

33 = 27

43 = 64 = 82

53 = 125

63 = 216

73 = 343

83 = 512

Thus, there are 7 perfect cubes from 1 to 500 and 64 is the only perfect square.


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