ISEE Mathematics Achievement Question 257: Answer and Explanation

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Question: 257

3. If the final total of a dinner bill-after including a 25% tip-is $50, what was the cost of the dinner before including the tip?

  • A. $12.50
  • B. $25.00
  • C. $37.50
  • D. $40.00

Correct Answer: D

Explanation:

D Use PITA here to find the correct answer. Usually, you would start with (B) or (C), but notice that finding (i.e., 25%) of either of these numbers will create a fraction. Try (D): Find of $40: (40) = = 10. If the tip was $10 and the price of the dinner was $40, then the total was $50. Since this matches the total in the problem, stop here. The correct answer is (D).

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