GCF, LCM, Prime

What is the LCM of 6 and 12

• 12

• 6

• 8

• 20

GCF of 24 and 36?

• 24

• 12

• 36

• 2

LCM of 12 and 8

• 24

• 18

• 8

• 12

GCF of 14 and 49

• 21

• 49

• 14

• 7

Which list of numbers contains only prime numbers?

• 31, 63, 97

• 23, 89, 109

• 57, 79, 113

• 49, 97, 129

Which statement is true about the greatest common factor (GCF) and least common multiple (LCM) of the numbers 12 and 20?

• The GCF is 32 more than the LCM

• The LCM is 32 more than the GCF

• The GCF is 56 more than the LCM

• The LCM is 56 more than the GCF