Answer:

GCF = 4

18

2x8

2x4

2x2

2x2x2x2

24

2x12

2x6

2x3

2x2x2x3

2x2

=4

Answer:

6

Step-by-step explanation:

prime factors of 18: 2x3x3

prime factors of 24: 2x2x2x3

There is one 2 and one 3 in common

The GCF is 2x3=6

To find the GCF of two numbers:

List the prime factors of each number. Multiply those factors both numbers HAVE in common. If there are no common prime factors, the GCF is 1