Factors and Multiples

Front

What is a factor?

Back

A factor is a number that divides another number without leaving a remainder. For example, 2 is a factor of 8 because 8 ÷ 2 = 4.

Front

What is a multiple?

Back

A multiple is the result of multiplying a number by an integer. For example, the multiples of 3 are 3, 6, 9, 12, etc.

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two or more numbers is the smallest number that is a multiple of all the numbers. For example, the LCM of 3 and 4 is 12.

Front

What is the greatest common factor (GCF)?

Back

The greatest common factor (GCF) of two or more numbers is the largest number that divides all of them without leaving a remainder. For example, the GCF of 8 and 12 is 4.

Front

Which number is a multiple of 5?

Back

Any number that ends in 0 or 5 is a multiple of 5. For example, 15 and 20 are multiples of 5.

Front

How do you find the multiples of a number?

Back

To find the multiples of a number, multiply that number by 1, 2, 3, and so on. For example, the multiples of 4 are 4, 8, 12, 16, etc.

Front

What is a common multiple?

Back

A common multiple is a number that is a multiple of two or more numbers. For example, 12 is a common multiple of 3 and 4.

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, and 7 are prime numbers.

Front

What is a composite number?

Back

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

Front

Which of the following is a factor of 30? 5, 7, 9, 11

Back

5 is a factor of 30 because 30 ÷ 5 = 6.