How many factors of 1040 are perfect squares?
(a) 3
(b) 4
(c) 6
(d) 5
Sol:
Factors of 1040
24×13×5
If A no. is perfect square power of no. is always even. or zero power of no. –
0, 2, 4, 6
1040→ 24×13×5
1, 4, 16, are factors of no. 1040 also perfect square.
