GCF

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.

Front

How do you find the GCF of two numbers?

Back

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

Front

What is the GCF of 12 and 16?

Back

The GCF is 4.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Tags

CCSS.4.OA.B.4

Front

Which of the following is NOT a prime number: 2, 3, 4, 5?

Back

4 is NOT a prime number.

Tags

CCSS.4.OA.B.4

Front

What is the GCF of 18 and 24?

Back

The GCF is 6.

Front

If the GCF of two numbers is 1, what does that indicate about the numbers?

Back

It indicates that the numbers are coprime, meaning they have no common factors other than 1.

Front

What is the GCF of 30 and 45?

Back

The GCF is 15.

Front

How can you use prime factorization to find the GCF?

Back

Factor both numbers into primes and multiply the lowest powers of all common prime factors.

Front

What is the GCF of 8 and 12?

Back

The GCF is 4.