Question

What is the greatest common factor of 12n and 18?

Answer 1

To find the GCF of two numbers:
1. List the prime factors of each number.
2. Multiply those factors both numbers have in common. If there are no common prime factors, the GCF is 1.

Answer 2

So 12n=2*2*3*n right?

Answer 3

18 is 2*3*3

Answer 4

The prime numbers they share are 2 and 3.

Answer 5

Multiply 2 and 3 and you get 6. GCF=6 IF n=/=3. If n=3 then GCF is?

Answer 6

2*3*3=18. In fact GCF=18 if n is a multiple of 3. GCF is 6 if n is not a multiple of 3.

Answer 7

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