21 and any multiple of 21.
The number 3 can go in to 63 21 times. 63 divided by 3 equals 21.
1, 3, 7, 21.
3
3 is the hcf
Any of its factors which are: 1, 3, 7 and 21
3 can go into both these numbers 72/3= 24 21/3= 7
It is 21 because 21/21 = 1 and 21/7 = 3
3
No 21/3 = 7 21/2 = 10.5 so not a whole number 2 goes into 20 or 22 but not 21
To find what the factors of a number are you can list the factor pairs: 1 x 21 3 x 7 The factors of 21 are 1, 3, 7, and 21.
21
3 = 63/21 = 150/50