Question

Find out the smallest number which when multiplied by 200,, so that the product becomes a perfect square ​

Answer 1

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By grouping the factors in pair of two $[(2 \times 2 \: and \: 5 \times 5) \times 2 = 200],$ we observe that a 2 is without pair.

Thus, we must multiply 200 by 2, so that the product becomes a perfect square. 400 is a square of 20.

Answer 2

above answer is correct