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Greatest Common Factors

Directions: Find the greatest common factor for both numbers below.

1.

 

128, 36

 

2.

 

84, 160

 

3.

 

8, 16

 

4.

 

24, 27

 

5.

 

108, 113

 

6.

 

4, 132

 

7.

 

56, 18

 

8.

 

25, 15

 

9.

 

20, 8

 

10.

 

90, 100

 

11.

 

42, 126

 

12.

 

2, 55

 

13.

 

80, 110

 

14.

 

36, 24

 

15.

 

11, 19

 

16.

 

60, 144

 

17.

 

3, 12

 

18.

 

20, 60

 

19.

 

66, 55

 

20.

 

8, 5

 

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