A trail mix recipe uses nuts and raisins in a ratio of 4 to 1. How many pounds of nuts are needed to make 30 pounds of trail mix?

Correct answer to question 159 (Arithmetic Reasoning): 24 pounds

Method

The ratio 4 to 1 splits the mix into 4 + 1 = 5 shares, and nuts take up 4 of them. One share is 30 divided by 5, or 6 pounds, so nuts come to 4 x 6 = 24 pounds.