GCF Practice

Front

What is the GCF (Greatest Common Factor)?

Back

The GCF is the largest number that can divide two or more numbers without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

List the factors of each number and identify the largest factor that they have in common.

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number.

Front

Which of the following is a factor of 24? 2, 3, 4, 5

Back

2, 3, and 4 are factors of 24; 5 is not.

Front

What is the GCF of 28 and 49?

Back

The GCF of 28 and 49 is 7.

Front

What is the GCF of 20 and 30?

Back

The GCF of 20 and 30 is 10.

Front

Which number is not a factor of 24? 6, 8, 3, 14

Back

14 is not a factor of 24.

Front

What is the smallest factor of any number?

Back

The smallest factor of any number is always 1.

Front

Can the GCF of two numbers be greater than either of the numbers?

Back

No, the GCF cannot be greater than the smallest of the two numbers.

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.