Factors and Multiples

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number. For example, the factors of 20 are 1, 2, 4, 5, 10, and 20.

Front

What are multiples?

Back

Multiples are numbers that can be divided by a certain number without leaving a remainder. For example, the multiples of 5 are 5, 10, 15, 20, 25, etc.

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. Examples include 2, 3, 5, 7, and 11.

Front

What is a composite number?

Back

A composite number is a number that has more than two positive divisors. For example, 4, 6, 8, and 12 are composite numbers.

Front

List the factors of 12.

Back

The factors of 12 are 1, 2, 3, 4, 6, and 12.

Front

List the prime numbers between 1 and 20.

Back

The prime numbers between 1 and 20 are 2, 3, 5, 7, 11, 13, 17, and 19.

Front

Is 21 a prime number?

Back

No, 21 is not a prime number because it can be divided by 1, 3, 7, and 21.

Front

Is 5 a prime number?

Back

Yes, 5 is a prime number because it can only be divided by 1 and 5.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the largest prime number less than 30?

Back

The largest prime number less than 30 is 29.