1, 3 and 9.
1, 3, 7, 9, 21, 63
3 goes into 36 and 63 evenly.
1, 3, 7, 9, 21, 27, 63, 189.
2
63 can be evenly divided by 1,3.7,9,21, and 63.
Factors of 27: 1, 3, 9, 27 Factors of 63: 1, 3, 7, 9, 21, 63 So the greatest (biggest) common (same) factor (a number that can divide it evenly) is 9.
9
1, 3, 7, 9, 21, 63
3 goes into 36 and 63 evenly.
The number 63 can be evenly divided by 1, 3, 7, 9, 21, and 63.
The number is 9.
These numbers will go into 378 evenly: 1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378.
7 x 9 = 63
The greatest common factor is 63
Any multiple of 315
The only whole number that can do that is ' 1 '.
The hcf is 21