Question

a number when divided by 91 gives a remainder 7 and the same number when divided by 7 what is its remainder

Answer 1

Let the unknown number be x

x divided by 91 gives a quotient (say y) and remainder 7

So x = 91y + 7

We can represent x as

x = 7(13y + 1)

So x is a multiple of 7

So when divided by 7, the number will leave 0 as remainder

So 0 is the answer