Get the answers you've been searching for with IDNLearn.com. Our community is here to provide the comprehensive and accurate answers you need to make informed decisions.
The first step is to write the prime factors of each number. We have
12 = 2 x 2 x 3
30 = 2 x 3 x 5
72 = 2 x 2 x 2 x 3 x 3
Looking at the factors, one 2 and one 3 are common to all three list of factors. Thus,
Greatest common factor = 2 x 3 = 6