Prime or Composite Numbers

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 has more than two positive divisors.

Front

Is 1 a prime number?

Back

No, 1 is not a prime number.

Front

Is 2 a prime number?

Back

Yes, 2 is the only even prime number.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the largest two-digit prime number?

Back

The largest two-digit prime number is 97.

Front

List three composite numbers.

Back

4, 6, 8.

Front

Is 21 prime or composite?

Back

Composite.

Front

Which number below is NOT prime: 2, 11, 13, 18?

Back

18.

Front

15 is a __________ number.

Back

Composite.