Any of its factors which are: 1, 3, 7 and 21
21 and any multiple of 21.
The smallest number that both 21 and 23 can go into is 483.
1, 3, 7, 21.
It is 21 because 21/21 = 1 and 21/7 = 3
Only the number 1.
The question does not make sense. 21/16 is one number: there is no second number in which it needs to go.
7
The number 7
Just 1.
3
3 is the hcf
The number 3 can go in to 63 21 times. 63 divided by 3 equals 21.