PRIME FACTORIZATION, GCF, and LCM

Composite numbers:

• Have 2 pairs of factors

• Don´t have factors

• Have more than 2 factors

• Are always bigger than prime numbers

Find the prime number.

• 10

• 4

• 9

• 7

Which list only has prime numbers?

• 2, 3, 4, 5

• 2,3,5,7

• 1,5,7,9

• 2,4,6,8

• 12

• 22

• 6

• 8

What are the prime factors of 30?

• 3,30

• 10,3

• 1,2,3,5,6,15,30

• 2,3,5

Use a factor tree to find the prime factorization of 48

What is the LCM of 3 and 6?

• 15

• 6

• 3

• 12

What is the least common multiple of 4 and 5?

• 40

• 60

• 1

• 20

What is the GCF and LCM of 12 and 18?

(GCF is first)

• 3 and 36

• 12 and 36

• 6 and 18

• 6 and 36

What is the GCF and LCM 9 and 15?

• 9 and 3

• 3 and 15

• 3 and 45

• 45 and 3