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; 1 is not considered a prime or composite number.

Front

List the first five prime numbers.

Back

2, 3, 5, 7, 11.

Front

List the first five composite numbers.

Back

4, 6, 8, 9, 10.

Front

Is the number 2 prime or composite?

Back

Prime; it is the only even prime number.

Front

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

Back

5 is prime; 4 and 6 are composite.

Front

What are the factors of the number 15?

Back

1, 3, 5, 15.

Front

What are the factors of the number 19?

Back

1, 19; it is prime.

Front

How can you determine if a number is prime?

Back

Check if it has exactly two distinct positive divisors: 1 and itself.