4.PAR.3.4: Prime and 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 the number 1 prime or composite?

Back

Neither. The number 1 is neither prime nor composite.

Front

Is the number 2 prime or composite?

Back

Prime. It is the only even prime number.

Front

Is the number 3 prime or composite?

Back

Prime. It has only two divisors: 1 and 3.

Front

Is the number 4 prime or composite?

Back

Composite. It has divisors 1, 2, and 4.

Front

Is the number 5 prime or composite?

Back

Prime. It has only two divisors: 1 and 5.

Front

Which of the following is a prime number: 8, 9, 11, 12?

Back

11 is a prime number.

Front

Which of the following is a composite number: 13, 15, 17, 19?

Back

15 is a composite number.

Front

List the first five prime numbers.

Back

2, 3, 5, 7, 11.