Question

The following numbers are not perfect squares . Give reason :
(i) 1547 (ii) 45743
(iii) 8948 (iv) 333333

Answer 1

We know that if the units digit is 2, 3, 7 or 8 of a number, then the number is not a perfect square.
(i) $\because$ 1547 has 7 as units digit.
$\therefore$ It is not a perfect square.

(ii) 45743 has 3 as units digit.
$\therefore$ It is not a perfect square.

(iii) $\because$ 8948 has 3 as units digit.
$\therefore$ It is not a perfect square.

(iv) $\because$ 333333 has 3 as units digit.
$\therefore$ It is not a perfect square.