FAST Review: GCF, LCM, Prime Factorization

What is the greatest common factor of 7 and 15?

• 1

• 7

• 15

• 21

What is the prime factorization of 138?

• 2 × 3 × 23

• 2 × 3 × 3 × 23

• 2 × 23

• 2 × 3

Write 8/10 in lowest terms.

• 4/5

• 2/5

• 8/10

• 1/2

Is 19 a prime number or a composite number?

• prime number

• composite number

• even number

• odd number

Tags

CCSS.4.OA.B.4

What is the least common multiple of 11 and 6?

• 22

• 33

• 66

• 18

Is 15 a prime number or a composite number?

• Prime number

• Composite number

• Neither

• Both

Tags

CCSS.4.OA.B.4

Write 6/16 in lowest terms.

• 3/8

• 1/4

• 2/5

• 1/2

Write 10/13 in lowest terms.

• 5/6

• 10/13

• 2/3

• 1/2

What is the greatest common factor of 2 and 14?

• 1

• 2

• 7

• 14

What is the prime factorization of 74?

• 2 × 37

• 2 × 74

• 2 × 2 × 37

• 74