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Earn +20 ptsQ: Is -441 a perfect square number?
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Is 441 a perfect square?
Yes it's 21 squared
Is the square root of 441 a rational number?
Yes because 21 is a rational number
What is the smallest number that can be multiplied by 147 so that the answer must be a square number?
your answer is 3 147 * 3 = 441 21 * 21 = 441
Can a perfect number be odd?
If by 'perfect number' you mean 'perfect SQUARE', then yes. 49 is an odd number and a perfect square.
How do you determine that 72 is not a square number?
You take the square root of the number. If it is a perfect square, this will be a whole number. If it is not, it isn't a perfect square.
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