1, 3, 7, 21.
Factors of 72... 1,2,3,4,6,8,9,12,18,36,24,72
mass nummbers
no, it is divisible by 2 and 17.
37 is already prime.
The GCF is 2.
As factors, only 1.
None.
No. Consider 7.
66 :)
9 and 36 9+36=45
1, 4, 9, 16, 25, 36, 49
This can be especially helpful if you are adding or subtracting fractions, so the bottom number on both fractions will be the same