Pre-Algebra, 2012
 SELECT PAGE NO. SELECT PROBLEM NO. FOR THE PAGE

 PAGE: 177 SET: Exercises PROBLEM: 1

Method 1:

List the factors of each number.

Factors of 12: 2, 3, 4, 6, 12

Factors of 30: 2, 3, 5, 6, 10, 15, 30

Identify the greatest common factor.

The greatest common factor of 12 and 30 is 6.

Method 2:

Write the prime factorization of each  number.

12 =  3 × 2 × 2.

30 = 3 × 2 × 5.

The GCF is the product of the common prime factors in each number.

GCF = 3 × 2.

The greatest common factor of 12 and 30 is 6.

The greatest common factor of 12 and 30 is 6.

TESTIMONIALS
 "I want to tell you that our students did well on the math exam and showed a marked improvement that, in my estimation, reflected the professional development the faculty received from you. THANK YOU!!!" June Barnett "Your site is amazing! It helped me get through Algebra." Charles "My daughter uses it to supplement her Algebra 1 school work. She finds it very helpful." Dan Pease
 Tweets by @mathskeydotcom

QUESTIONS? LET US HELP.