PSAT Math Multiple-Choice Question 268: Answer and Explanation

Question: 268

A mechanic purchases 18 gallons of oil to complete a number of oil changes. If he needs a gallon of oil for each car, how many oil changes can he do before he runs out?

• A. 54 oil changes
• B. 60 oil changes
• C. 15 oil changes
• D. 34 oil changes

Correct Answer: B

Explanation:

The mechanic can do 60 oil changes because 18 gallons ÷ 0.3 gallons per car = 60 oil changes. See Lesson: Solving Real-World Mathematical Problems.