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Earn +20 ptsQ: List all square numbers
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Are all square roots of even numbers rational?
No. The square roots 8 are irrational, as are the square roots of most even numbers.
A list of all irrational numbers?
There is an infinite amount.
Is the square root of 81 rational?
Yes. The square root of 81 is 9 - a natural number and all natural numbers are rational numbers.
What two whole numbers are closest to the square root of 19?
4x4=16, and 5x5=25, so 4 and 5 are the whole numbers closest to the square root of 19. [And incidentally of all the square roots of all the whole numbers between 16 and 25.]
What are non-perfect square numbers?
Non-perfect square numbers are numbers that are not formed from the square of a number. 12, 13, 14, 21, 99, etc, are all non-perfect square numbers because when you square root them you do not get a whole number, which means they are not formed by any whole number, x, being squared (x^2).
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