Question

How many two digit number are divisible by 3 ?

Answer 1

33 two digit numbers are divisible by 3

Answer 2

1st no. Will be 12 and further it will go by adding 3
Like 12,15,18,21.......99
So 1st term is 12
d= 3
an=99
n=?
Use the formula:-
an=a+(n-1)*d
Substitute the value
And solve
It will help you