How do you find the greatest common factor of 30, 18, and 12?

1 Answer
Tony B · MeneerNask
Jan 5, 2017

You factorize each number into primes:

Explanation:

#30=color(red)(2)color(white)(xx2)xxcolor(red)(3)color(white)(xx3)xx5#

#18=color(red)(2)color(white)(xx2)xxcolor(red)(3)xx3#

#12=color(red)(2)xx2xxcolor(red)(3)#

What they all have in common is #2xx3=6#

Related questions
See all questions in Greatest Common Factor
Impact of this question
4428 views around the world
You can reuse this answer
Creative Commons License