Prime Factorization

A prime number...

• has one factor.
• has more than 2 factors.
• has 100 factors.
• has exactly 2 factors: 1 and the itself.

Tags

CCSS.4.OA.B.4

A composite number ...

• has more than 2 factors.
• has one factor.
• has at least 10 factors.
• is always a really big number.

Tags

CCSS.4.OA.B.4

Which of the following is NOT prime?

• 29

• 23

• 17

• 39

Tags

CCSS.4.OA.B.4

GCF of 10 and 50

• 10
• 2
• 5
• 50

GCF of 5 and 35

• 7
• 5
• 2
• 35

GCF of 8 and 20

• 8
• 2
• 4
• 10

GCF of 15 and 35

• 15
• 3
• 7
• 5

What is the prime factorization of 16?

• 2 × 8

• 2 × 2 × 2 × 2

• 4 × 4

• 1 × 16

What is the prime factorization of 36?

• 2 × 3 × 6

• 3 × 3 × 4

• 2 × 2 × 3 × 3

• 2 × 18

Which of these is the prime factorization of 42?

• 2 × 3 × 7

• 2 × 6 × 7

• 3 × 14

• 2 × 3 × 14