Q . 23524 is divided by 24 the reminder is-
By formula -
a2 - b2 = (a+b) (a-b)
When n is even (xn - an) is completely divisible by (x+a)
so (23524 - 1524) is completely divisible by (23+1 ) i.e. 24
=> (23524 - 1) is completely divisible by 24
=> On dividing(23524) by 24 we get 1 as reminder.
So the reminder is 1