Question

How many two digits numbers are divisible by 7

Answer 1

Use AP to find the answer.
Here a is 14 as it is the first two digit no div by 7.
d is 7.
last term(Tn) is 98.
Tn =a+(n-1 )d
If u substitute the values then the ans will be 13.
So 'n' is 13

Hope this helps.