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

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 neither prime nor composite because it has only one factor.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

Is 2 a prime number?

Back

Yes, 2 is a prime number because it has only two factors: 1 and 2.

Front

List the first five prime numbers.

Back

The first five prime numbers are 2, 3, 5, 7, and 11.

Front

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

Back

5 is a prime number.

Front

What is the difference between prime and composite numbers?

Back

Prime numbers have exactly two distinct positive divisors, while composite numbers have more than two.

Front

Is 35 a prime number?

Back

No, 35 is a composite number because it has factors other than 1 and itself (1, 5, 7, 35).

Front

Which one of the following is not a prime number: 11, 13, 15?

Back

15 is not a prime number because it has factors (1, 3, 5, 15).