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There are two, 0 and 1.

Q: What is the number that when multiplied by itself equals the given number?

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The number is called a "cube root"

the square root of the given number

A square root.

4.242640687It's the square root of 18

Given a number, if you can find another number (usually smaller than the given number) when multiplied by itself yields the original given number then the original given number is a perfect square number

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A square number.

0 and 1. 1x1 = 1. The answer is itself!

The number is called a "cube root"

It is a cube number as for example 3*3*3 = 27 which is a cube number.

A square root is multiplied by itself to get a given whole number.

the square root of the given number

If the number is x, then the number multiplied by itself three times would be x4 ... so if the "given number" is y, then y = x4 and thus x is related to the "given number by x = y1/4 i.e. the quartic or fourth root of 4.

A square root.

The square root of 20 is: ± 4.472136The square root of 20 is ± 4.472136 (to 7 sf).A square root of a number is the number that when multiplied by itself equals the given number.

4.242640687It's the square root of 18

The number is called a 'square root'.

Given a number, if you can find another number (usually smaller than the given number) when multiplied by itself yields the original given number then the original given number is a perfect square number