Q: What is a number that must be multiplied times itself to equal a given number?

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There are two, 0 and 1.

A square root.

4.242640687It's the square root of 18

The number is called a "cube 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

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The number is called a 'square root'.

Taking the square root means to find a number that, when squared (when multiplied by itself) is equal to the given number. If I ask for the square root of 9, I want a number that, when multiplied by itself, is equal to 9 - in this case, the answer is 3.

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

A square number.

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

There are two, 0 and 1.

A square root.

4.242640687It's the square root of 18

The number is called a "cube 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

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

The cube root of a number is a value that, when multiplied by itself three times, gives that original number. For example, the cube root of 27 is 3 because 3 x 3 x 3 = 27. It is denoted by the symbol ∛.