3 goes into 36 and 63 evenly.
1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315.
It is: 1
7 is the HCF of 35 and 63
1 and 7.
Any multiple of 315
1, 3, 7, 9, 21, 63.
1, 3, 7, 9, 21, 63.
It is: 1
1, 3, 9.
4 goes into 63, 15 times evenly with a remainder of 3
1 and 5.