Prime and Composite Number Flash Cards

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

What is a composite number?

Back

A composite number is a natural number greater than 1 that is not prime, meaning it has divisors other than 1 and itself.

Front

Prime or Composite

15

Back

Composite because it has more than 2 factors. 1 x 15; 3 x 5.

Front

Prime or Composite

47

Back

Prime because it only has 2 factors.

1 x 47.

Front

Prime or composite

12

Back

Composite.

1 x 12; 2 x 6; 3 x 4

Front

Prime or composite

33?

Back

Composite.

1 x 33; 3 x 11.

Front

Prime or composite

2?

Back

Prime.

1 x 2

Front

Prime or composite

40?

Back

Composite

1 x 40; 2 x 20; 4 x 10; 5 x 8.