Bell Ringer Math Greatest Common Factor

Front

What is the Greatest Common Factor (GCF)?

Back

The GCF is the largest positive integer that divides all the given numbers without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

1. List the factors of each number. 2. Identify the common factors. 3. The largest of these common factors is the GCF.

Front

What is the GCF of 12 and 48?

Back

12

Front

What is the GCF of 9 and 36?

Back

9

Front

What is the GCF of 25, 75, and 200?

Back

25

Front

What is the GCF of 15 and 45?

Back

15

Front

What is the GCF of 72 and 88?

Back

8

Front

What is a factor?

Back

A factor is a whole number that can be divided evenly into another number.

Front

What is the relationship between GCF and prime factorization?

Back

The GCF can be found by multiplying the lowest powers of all prime factors common to the numbers.

Front

What is the GCF of two prime numbers?

Back

The GCF of two prime numbers is always 1, since they have no common factors other than 1.