Question

A number when divided by 21 leaves remainder 5 find. The remainder when it is divided by. 7

Answer 1

Answer: 5

Step-by-step explanation:

I prefer doing these sums by non mathematics way.

Let the number be 26.

The divisor is 21 so remainder is 5.

If we divide 26 by 7. We will get 5 as remainder.

To be sure try it with other pairs too.

Answer 2

suppose the no.is x
x/21=5
x=5×21
x=105
now it is given than find the remainder when it is divided by 7
105/7=15