Q4. Find the square roots of the following numbers by the Prime Factorisation Method.

(iii) 1764

Answers (1)

We have 1764, by prime factorization we get 

           1764 = 2\times2\times3\times3\times7\times7

or          1764 =( 2\times3\times7)^{2} = 42^{2}

Thus the square root of 1764 is 42.

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