Prime and composite numbers

Front

Is 5 prime or composite?

Back

Prime, because it has two factors: 1 and 5.

Front

What is a prime number?

Back

A prime number is a number with ONLY two factors: 1 and itself.

Front

Which is equal to 2 x 2 x 5 x 5?

Back

100

Front

What is a composite number?

Back

A composite number is a number with MORE THAN two factors.

Front

Which one is a composite number: 37, 41, 21, 29?

Back

21 is a composite number.

Front

List the first five prime numbers.

Back

2, 3, 5, 7, 11.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

Can a number be both prime and composite?

Back

No, a number cannot be both prime and composite.

Front

What are the factors of 12?

Back

1, 2, 3, 4, 6, 12 (12 is composite).

Front

What are the factors of 13?

Back

1, 13 (13 is prime).