Factors, Multiples, Prime, and Composite

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number. For example, the factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24.

Front

What are multiples?

Back

Multiples are numbers that can be obtained by multiplying a number by an integer. For example, the multiples of 3 are 3, 6, 9, 12, 15, 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. For example, 2, 3, 5, 7, and 11 are prime numbers.

Front

What is a composite number?

Back

A composite number is a number greater than 1 that has more than two positive divisors. For example, 4, 6, 8, 9, and 10 are composite numbers.

Front

Is 1 a prime number?

Back

No, 1 is not a prime number because it only has 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 a factor pair?

Back

A factor pair consists of two numbers that, when multiplied together, equal a given number. For example, (4, 5) is a factor pair of 20.

Front

How do you find the factors of a number?

Back

To find the factors of a number, list all the integers that can divide that number without leaving a remainder.

Front

What is the smallest prime number?

Back

The smallest prime number is 2.

Front

What is the largest prime number less than 20?

Back

The largest prime number less than 20 is 19.