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.
2
C.
3
D.
6
Hint
2.
Which two numbers have a GCF of 9?
A.
36, 45
B.
45, 95
C.
36, 39
D.
18, 36
Hint
3.
Find the GCF of 32 and 42.
A.
4
B.
2
C.
14
D.
3
Hint
4.
Find the GCF of 38 and 49.
A.
4
B.
3
C.
1
D.
2
Hint
5.
Which two numbers have a GCF of 7?
A.
25, 45
B.
7, 17
C.
35, 126
D.
21, 63
Hint