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  • Find the square roots of the following numbers by the Prime Factorisation Method.(ii) 400

Q.4  Find the square roots of the following numbers by the Prime Factorisation Method.

(ii) 400

Answers (1)

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By prime factorization, we get

                  400 = 2\times2\times2\times2\times5\times5

or               400 = (2\times2\times5)^{2} = 20^{2}

Thus the square root of 400 is 20

Posted by

Devendra Khairwa

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