What number multiplied by itself equals 640?

Here we will answer: What number multiplied by itself gives 640? In other words, what number times itself will equal 640?

We have identified many different ways of getting the answer to this question:

Algebra Method:
Make an algebra equation and solve for x:

x • x = 640
x ≈ 25.298

Square Root Method:
Take the square root of 640 to get the answer:

√640 ≈ 25.298

Exponent Method:
Make the base 640 and the exponent 0.5 to get the answer:

640^0.5 ≈ 25.298

There you go! Now you know how to calculate "What number multiplied by itself equals 640?"

The bottom line is that 25.298 times itself equals approximately 640 as illustrated here:

25.298 x 25.298 ≈ 640

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