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 15 are 1, 3, 5, and 15.

Front

What are multiples?

Back

Multiples are the result of multiplying a number by an integer. For example, the first six multiples of 7 are 7, 14, 21, 28, 35, and 42.

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, 11 is a prime number.

Front

What is a composite number?

Back

A composite number is a number that has more than two factors. For example, 4 is composite because it has factors 1, 2, and 4.

Front

What is the greatest common factor (GCF)?

Back

The GCF is the largest number that divides two or more numbers without leaving a remainder. For example, the GCF of 12 and 15 is 3.

Front

What is the least common multiple (LCM)?

Back

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

Front

How do you find factors of a number?

Back

To find factors, divide the number by integers starting from 1 up to the number itself and check which divisions result in whole numbers.

Front

How do you find multiples of a number?

Back

To find multiples, multiply the number by integers starting from 1. For example, multiples of 5 are 5, 10, 15, 20, etc.

Front

Which of the following is NOT a factor of 30? 15, 2, 5, 7

Back

7 is NOT a factor of 30.

Front

Which of the following is NOT a multiple of 3? 12, 33, 14, 21

Back

14 is NOT a multiple of 3.