Prime Numbers

Front

What are prime numbers divisible by?

Back

1 and itself.

Front

Why is 1 neither prime nor composite?

Back

It only has one factor.

Front

Which of the following is not a prime number: 87, 29, 31?

Back

87.

Front

Which one of the following is not a prime number: 27, 19, 23?

Back

27.

Front

Is 29 prime or composite?

Back

Prime.

Front

What is the definition of 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

List the first five prime numbers.

Back

2, 3, 5, 7, 11.

Front

What is the smallest prime number?

Back

2.

Front

Can a prime number be even? If so, which one?

Back

Yes, the only even prime number is 2.

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.