1.
Look at the factors of 18 and 30. What is the greatest common factor?
factors of 18: 1, 2, 3, 6, 9, 18
factors of 30: 1, 2, 3, 5, 6, 10, 15, 30
A.
5
B.
6
C.
2
D.
3
Hint
2.
Find the GCF of 32 and 42.
A.
3
B.
14
C.
2
D.
4
Hint
3.
Find the GCF of 38 and 49.
A.
2
B.
3
C.
4
D.
1
Hint
4.
Find the GCF of 33, 48, and 54.
A.
1
B.
8
C.
3
D.
2
Hint
5.
Which two numbers have a GCF of 7?
A.
25, 45
B.
35, 126
C.
7, 17
D.
21, 63
Hint