Question

Which of the following are perfect cubes? 400
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Answer 1

Answer:

400 is a square of 20

Thanks !

Answer 2

A perfect cube end with units digits of perfect cubes: If a number ends in 0, its cube ends in 0. If a number ends in 2, its cube ends in 8. If a number ends in 3, its cube ends in 7.

$400 \times 400 \times 400 = 64000000$

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