1, 3, 7, 9, 21, 63
The greatest common factor is 63
The highest common factor of 81 and 63 is 9
The highest common factor of both numbers is 9
7 since 7 goes into 63 and 140 evenly and 7 is a prime.
Yes, 21 is a factor of 63. 63 = 3x21
No; 3 is a factor of 63.
No, 9 is a factor of 63.
63 has a square factor, but no equal ones.
63 is.
Yes, 7 is a factor of 63. The factors of 63 are 1, 3, 7, 9, 21, and 63.
7, what's the highest number that goes evenly into 63 and 70. There aren't that many... :D
No, 6 is not a factor of 63 because it does not go in evenly.