GCF/LCM

GCF OF 6 AND 8

• 3

• 24

• 2

• 48

GCF OF 8 AND 20

• 2

• 40

• 120

• 4

LCM OF 8 AND 20

• 40

• 120

• 60

• 160

LCM OF 9 AND 15

• 45

• 3

• 180

• 90

LCM OF 11 AND 12

• 132

• 121

• 1

• 92

LCM OF 12 AND 40

• 140

• 120

• 160

• 144

GCF OF 12 AND 40

• 2

• 8

• 6

• 4

A prime number is:

• a number that is negative.

• a number that has less than three factors.

• a number that has more than three factors.

• a number that can only be multiplied by one and itself.

The name of a number that has more than two factors is:

• a negative number.

• a rational number.

• a composite number.

• a primary number.

What is the difference between a GCF and LCM?

• One stands for greatest common factor and the other stands for least common multiple.

• GCF is the largest shared factor of two or more other numbers, LCM is the smallest number that is a multiple of two or more numbers.

• They are exact opposites.

• They mean essentially the same thing.