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How many times does the digit 1 appear when the whole numbers from 1 through 20 are written?

Correct answer: B. b) 12 times

  • A. a) 11 times
  • B. b) 12 times
  • C. c) 13 times
  • D. d) 14 times

Explanation

There is one 1 in the number 1, ten occurrences in 10 through 19, and one extra 1 in 11. The total is 12.

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About Quantitative Reasoning

Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.

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