The average of five numbers is 18. If one of the numbers is removed, the average of the remaining four numbers is 16. What number was removed?
✓ Correct Answer: Option C
The sum of the five numbers is 5 × 18 = 90. After one number is removed, the sum of the remaining four numbers is 4 × 16 = 64. The removed number is the difference between these sums: 90 - 64 = 26.
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This 2-level GMAT Exam Prep question from the Quantitative Reasoning topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
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