Greatest Common Factor

Front

What is a factor?

Back

A factor is a whole number that can be divided evenly into another number without leaving a remainder.

Front

List the factors of 25.

Back

The factors of 25 are 1, 5, and 25.

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.

Front

What is the GCF of 15 and 30?

Back

The GCF of 15 and 30 is 15.

Front

What is the GCF of 18 and 36?

Back

The GCF of 18 and 36 is 18.

Front

Which number is NOT a factor of 9?

Back

0 is NOT a factor of 9.

Front

What is the GCF of 4 and 16?

Back

The GCF of 4 and 16 is 4.

Front

How do you find the GCF of two numbers?

Back

To find the GCF of two numbers, list the factors of each number and identify the largest factor that they have in common.

Front

What is the relationship between factors and multiples?

Back

Factors are numbers that divide another number evenly, while multiples are the result of multiplying a number by an integer.

Front

Can the GCF of two prime numbers be greater than 1?

Back

No, the GCF of two prime numbers is always 1, as they have no common factors other than 1.