Prime and Composite

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

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 1 a prime number?

Back

No, 1 is not a prime number.

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number.

Front

How many factors does the number 36 have?

Back

36 has 9 factors: 1, 2, 3, 4, 6, 9, 12, 18, 36.

Front

Is 2 a prime number?

Back

Yes, 2 is the only even prime number.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the largest two-digit prime number?

Back

The largest two-digit prime number is 97.