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Question

What is the square root of 400?


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Solution

Determine the square root of 400.

The square root of a number is the value that returns the original number when multiplied by itself.

Find the prime factors of 400:

400=2×2×10×10

Take square root from both sides of the above equation:

400=2×2×10×10400=20

Hence, the square root of 400 is 20.


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