FE- Factors, Multiples, LCM, GCF

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Which number is composite?

• 36

• 3

• 11

• 31

Which number is prime?

• 32

• 27

• 19

• 45

What are the factors of 24?

• 1, 2, 3, 4, 5, 6, 7, 8, 24

• 1, 3, 4, 6, 8, 10, 24

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 2, 4, 8, 12, 24

Is 10 a multiple of 5?

• Yes

• No

Which are the factors of 21?

• 1,3,7,21

• 1,3,8,21

• 2,4,6,21

• 3,7,21,28

Use a number tree to find the prime factorization of 32

• 2 x 2 x 2 x 4

• 2 x 2 x 2 x 2 x 2

2 x 2 x 2  or 2³ is the prime factorization of

• 6
• 12
• 22
• 8

Which of the following is a factor of 12? Select all that apply.

• 12

• 2

• 24

• 3