Question

Least no substracted from 10420 to make it.A perfect squre

Answer 1

These types of questions can be solved by the hit and trial method

${100}^{2} \\ = 10000 \\ {102}^{2} \\ = 10404$

Since (102)^2 = 10404

10420 - 10404

=16

Therefore the least no to be subtracted is 16.

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