Question

if x can be divide by 7 and 9 without leaving a remainder, it can also divided by which number without leaving a remainder​

Answer 1

A number that can go into x would be 3

This is because 7 x 9 is 63 meaning x would be 63 and 63 divided by 3 is 21 which does NOT Leave a reminder.

Answer 2

all counting numbers except one