Prime and Composite Numbers

Front

Is 5 prime or composite?

Back

Prime, because it has two factors.

Front

Is 21 prime or composite?

Back

Composite, because it has 4 factors.

Front

What is a prime number?

Back

a number with ONLY two factors

Front

What is a composite number?

Back

A number with MORE THAN TWO factors.

Front

Which list has ONLY prime numbers? Options:

1, 2, 3

,

2, 3, 5

,

2, 3, 4

,

2, 4, 6

Back

2, 3, 5

Front

Which list has ONLY composite numbers? Options: 8, 16, 24; 2, 4, 6; 5, 10, 15; 3, 6, 9

Back

8, 16, 24

Front

Is 3 a factor of 21?

Back

yes

Front

Is 3 a factor of 26?

Back

No

Front

Which of the following numbers is not a factor of 24? Options: 6, 8, 3, 7

Back

7

Front

List all the factors of 15.

Back

1, 3, 5, 15