Question

How many integers between 10 and 100 are divisible by 3 ? Solve by a formula​

Answer 1

[100/3] = 33

[10/3] = 3

Where [.] is greatest integer function

So, 33 - 3 = 30

Best formula for the problem

Answered by an IIT JEE ASPIRANT and all India mathematics OLYMPIAD TOPPER in class 10th