Question

How many three digit natural number are divisable by 4 ?

Answer 1

The first three digit no. that is divisible by 4 is 100
And the last three digit no. that is divisible by 4 is 996

So. The AP will be 100, 104, 108..........., 996

a= 100
d= 4
l = 996

We know that,
l = a+(n-1) *d
996 = 100 + (n-1) 4
896 = (n-1) * 4
(n-1) = 224
n = 225

So Total three digit no. that are divisible by 4 = 225

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