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81 is a perfect squarebecause 81 = 9*9. It is NOT a perfect cube.
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Earn +20 ptsQ: Why is 81 both a perfect square and a perfect cube?
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What is 81 a perfect square by what number?
81 is a perfect square because 81 = 9 x 9
What is the answer to the cube root of 729 then square it?
The cube root of 729 is 9 and 9 squared is 81.
What is the probability that a randomly selected two-digit positive integer is a perfect square or a perfect cube?
There are 90 two-digit numbers from 10 to 99. Of those, 6 are perfect squares (16, 25, 36, 49, 64, and 81) and 2 are perfect cubes (27 and 64). Each perfect square or root has a probability of 1 in 90 in being drawn.
What is the two square roots of 81?
Both 9 and -9 are square roots of 81
What is the largest perfect square factor of 405?
81 is the only one.
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