Question

Find the sum of all three digit natural numbers which on division by 7 remainder

Answer 1

I didn't know this answer

Answer 2

The smallest 3 digit number = 100

The first 3 digit number is  also 100.

To find the first 3 digit number divisible by 7, we divide the very first 3 digit number 100 by 7 

100/7 = 14.29

We have decimal in the result of 100/7. 

Clearly the first 3 digit number 100 is not exactly divisible by 7.

Let us divide the second 3 digit number 101 by 7.

101/7 = 14.43

We have decimal in the result of 101/7 also.

So, the second 3 digit number 101 is also not exactly divisible by 7