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 prime factors of each number. 2. Identify the common factors. 3. Multiply the common factors to find the GCF.

Front

What are the PRIME factors of 35?

Back

7, 5

Front

What are the PRIME factors of 30?

Back

2, 3, 5

Front

What are the PRIME factors of 42?

Back

2, 3, 7

Front

What are the PRIME factors of 24?

Back

2, 2, 2, 3

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.

Front

What is the relationship between GCF and prime factors?

Back

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

Front

Determine the GCF of 12 and 18.

Back

The GCF is 6.

Front

Determine the GCF of 15 and 25.

Back

The GCF is 5.