Flashcard on Prime 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

Is 1 a prime number?

Back

No, 1 is not considered a prime 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

What is the largest prime number under 10?

Back

The largest prime number under 10 is 7.

Front

Which of the following is a prime number: 4, 5, 6?

Back

5 is a prime number.

Front

What is the only even prime number?

Back

The only even prime number is 2.

Front

Are all prime numbers odd?

Back

No, the only even prime number is 2; all other prime numbers are odd.

Front

Which number is NOT a prime number: 13, 15, 17?

Back

15 is not a prime number.

Front

What is a composite number?

Back

A composite number is a natural number greater than 1 that is not prime, meaning it has more than two positive divisors.