5.4A Prime Factoring

What are the prime factors of 20?

• 2 and 5

• 1 and 20

• 2 and 10

• 2, 3, and 5

What are the prime factors of 39?

• 1 and 39

• 2 and 15

• 3 and 13

• 2 and 13

What are the prime factors of 76?

• 4 and 19

• 2 and 38

• 1 and 76

• 2 and 19

What are the prime factors of 84?

• 2, 3, and 7

• 3 and 7

• 2 and 7

• 6 and 7

What are the prime factors of 51?

• 1 and 51

• 2 and 13

• 3 and 13

• 3 and 17

What are the prime factors of 100?

• 4 and 25

• 2 and 25

• 5 and 20

• 2 and 5

What are the prime factors of 9?

• 2 and 3

• 3

• 1 and 3

• 1 and 9

What are the prime factors of 18?

• 2 and 9

• 2 and 3

• 1 and 18

• 3 and 6

What are the prime factors of 21?

• 1 and 21

• 2 and 3

• 3 and 5

• 3 and 7

What are the prime factors of 5?

• 1 and 5

• 2 and 3

• 3

• 5