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Earn +20 ptsQ: Is 9 an almost perfect number?
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Is 32 an almost perfect number?
Yes. The only known almost perfect numbers are the powers of 2. 32 = 2^5 is an almost perfect number. It has not yet been proved whether {x: x = 2^n for n in N} = {x: x is an almost perfect number}.
Is 9 a perfect square number?
Yes, nine is a perfect squarebecause 9 = 3*3
How is a sudoku puzzle a perfect square?
Because 9*9 = 81 which is a square number or a perfect square.
What is a whole number than can be named as a product of a number with itself called?
A whole number that can be made by multiplying an integer by itself is a perfect square, or square number. An example is 81, which is a perfect square made by 9 x 9.
Why is square root of 9 a rational number and square root of 3 is an irrational number?
Because 9 is a perfect square - which means that its square root is an integer. 3 is not a perfect square.
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