Unit 1 Prime and Composite Numbers Flashcard

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 not a prime number because it has only one positive divisor.

Front

Is 2 a prime number?

Back

Yes, 2 is a prime number because its only divisors are 1 and 2.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the smallest composite number?

Back

The smallest composite number is 4.

Front

Identify a composite number: 3, 5, 6, 7.

Back

6 is a composite number.

Front

Identify a prime number: 9, 10, 11, 12.

Back

11 is a prime number.

Front

Which of the following is composite: 15, 17, 19, 23?

Back

15 is a composite number.

Front

Which of the following is prime: 25, 29, 30, 32?

Back

29 is a prime number.