A supply clerk must pack 84 red markers and 60 blue markers into identical kits with none left over. What is the greatest number of kits that can be made?

Correct answer to question 53 (Arithmetic Reasoning): 12 kits

Method

Identical kits with nothing left over means the kit count must divide both totals, and the greatest such number is the greatest common factor. Since 84 is 2 x 2 x 3 x 7 and 60 is 2 x 2 x 3 x 5, they share 2 x 2 x 3 = 12, so 12 kits can be made.