Question

Find the least number which should be subtracted from 18 to make it a perfect square

Answer 1

Answer:

Wkt, 16 is a perfect square

So 2 must be subtracted from 18 to make it a perfect square.

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Answer 2

Answer:

The least no. that should be subtracted is 2. On subtracting 2 we get 16 which is a perfect square of 4.