Prime and Composite Numbers

Front

What is a prime number?

Back

A prime number is a 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 positive integer that has at least one positive divisor other than one or itself, meaning it can be divided evenly by numbers other than 1 and itself.

Front

Is the number 1 considered a prime number?

Back

No, the number 1 is not considered a prime number.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

Is the number 2 a prime number or a composite number?

Back

The number 2 is a prime number.

Front

List three examples of prime numbers.

Back

Examples of prime numbers include 2, 3, 5, 7, 11.

Front

List three examples of composite numbers.

Back

Examples of composite numbers include 4, 6, 8, 9, 10, 12.

Front

What is the prime factorization of 12?

Back

The prime factorization of 12 is 2 x 2 x 3.

Front

How can you determine if a number is prime?

Back

To determine if a number is prime, check if it has any divisors other than 1 and itself by testing divisibility with prime numbers up to its square root.

Front

Is 15 a prime number or a composite number?

Back

15 is a composite number.