ISEE Mathematics Achievement Question 249: Answer and Explanation

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Question: 249

10. A tank of oil is one-third full. When full, the tank holds 90 gallons. How many gallons of oil are in the tank now?

  • A. 10
  • B. 20
  • C. 30
  • D. 40

Correct Answer: C

Explanation:

C Since the question asks for a specific value, use PITA to answer the question, starting with (C). The choices represent the amount of oil in the tank now, which is one-third of the total amount. Choice (C) is 30: is 30 one-third of the total amount (90 gallons) the tank holds? 30 = (90) is true, so the correct answer is (C).

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