1.

The following numbers are obviously not perfect squares. Give reason.(i) 1057              (ii) 23453              (iii) 7928                (iv) 222222(v) 64000           (vi) 89722             (vii) 222000           (viii) 505050

Answer» A number can be a perfect square only when it has unit digit among `1,4,9,6,5`.
In all the given numbers, the unit digit is not equal to any of digits `1,4,9,6,5`.
So, all given numbers are not perfect squares.


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