Prime Factorization and Factors

Find the prime factorization of 18

• 2 • 9

• 2² • 3

• 2 • 3²

• 3 • 6

Find the prime factorization of 60

• 5 • 12

• 2 • 3² • 5

• 2² • 3 • 5

• 2⁷

Select all of the prime numbers.

• 1

• 2

• 7

• 18

• 21

Select all of the prime numbers.

• 0

• 19

• 31

• 47

• 51

2 is the only even prime number

• True

• False

A prime number...

• has one factor.

• has more than 2 factors.

• has 100 factors.

• has exactly 2 factors: 1 and the itself.

A composite number ...

• has more than 2 factors.

• has one factor.

• has at least 10 factors.

• is always a really big number.

 

One is...

• prime

• composite

• not prime or composite

• he loneliest number

Which of the following is NOT prime?

• 29

• 23

• 17

• 39

Is 5, a prime or composite number? 

• prime

• composite