Question

How many numbers of two digit no are divisible by 5

Answer 1

It's just a simple Arithmetic Progression question:-

a = 10

d = 5

an = 95

$an = a + (n - 1)d \\ 95 = 10 + (n - 1)5 \\ \frac{85}{5} = n - 1 \\ n - 1 = 17 \\ n = 18$

So, there are 18 terms.

Answer 2

Total 18 two digit numbers r divisible by 5.

For explanation refer to the pic.

Hope it helps u