Question

108. The smallest perfect square that is divisible by 7!
(I.I.F.T., 2010)
(a) 19600
(b) 44100
(C) 176400
(d) 705600​

Answer 1

196oo,is the smallest perfect square that is divisible by 7.

Answer 2

Answer:

7!=7*6*5*4*3*2*1

=7*2*3*5*2*2*3*2

=(2^4*3^2*5*7)*5*7

=5040*35=176400