SAT Math Multiple Choice Question 9: Answer and Explanation

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Question: 9

5. If each number in the following sum were increased by t, the new sum would be 4.22. What is the value of t ?

  • A. 0.24
  • B. 0.29
  • C. 0.33
  • D. 0.37

Correct Answer: D


D To figure out how much you need to add to 2.74 to get to 4.22, take 4.22 − 2.74 on your calculator. The difference between the two numbers is 1.48. This increase reflects the same number, t, added to each of the four numbers on the list. Divide 1.48 by 4 to find that t = 0.37, which is (D).

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