Greatest common factor
Least common multiple
100

Find the  greatest common factor (GCM) of: 4 and 8

the GCF is 4

100

Find least common multiple (GCF) of: 12 and 4

The GCF is 12

200

Find the greatest common factor (GCF) of: 15 and 35

The GCF is 5

200

Find the least common multiple (LCM) of: 6 and 7

The LCM is 42

300

Find the greatest common factor GCF of: 21 and 28

The GCF is 7

300

Find the least common multiple (LCM) of:  3 and 9

The LCM is 9

400

Find the Least Common Factor (GCF)  of: 22 and 77

The GCF is 11

400

Find the least common multiple (LCM) of: 25 and 75

The LCM  is 75

500

Find the Greatest Common factor (GCF) of: 25 and 75

The GCF is 25

500

Find the least common multiple (LCM) of: 2 and 5

The LCM is 10

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