GCF Level 1
GCF Level 2
Distributive property
GCF Level 3
100

The Greatest Common Factor of 15 & 21

3

100

The Greatest Common Factor of 18 & 36

18

100

3(2x + 5)

 6x + 15

100

The Greatest Common Factor of 160 & 144

16

200

The Greatest Common Factor of   14 &  77

7

200

The Greatest Common Factor of 32 & 48

16

200

2(3y + 9)

6y + 18

200

The Greatest Common Factor of 150 & 225

75

300

The Greatest Common Factor of 20 & 44

4

300

The Greatest Common Factor of 24n & 80n

8n

300

10(12 + 8y)

120 + 80y

300

The Greatest Common Factor of 280x & 144x

8x

400

The Greatest Common Factor of 24 & 36

12

400

The Greatest Common Factor of 18y & 90y

18y

400

12(4y + 5) + 12

48y + 72

400

FLASH DOJO:

The Greatest Common Factor of 68 & 119

17

500

The Greatest Common Factor of 10 & 45

5

500

The Greatest Common Factor 25 & 150

25

500

3x + 7(x + y)

10x + 7y

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