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GMAT Quantitative Aptitude — practice by topic

Browse 247 questions across 13 Quantitative Aptitude topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Quantitative Aptitude topics

Probability (104)Permutations and Combinations (56)Algebra (30)Modern Mathematics (30)Quantitative Aptitude (30)Data Interpretation (12)Averages (9)Interest (9)Profit and Loss (9)Ratio and Proportion (9)Simple & Compound Interest (9)Simple Interest (9)Time and Work (9)

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Candidates who appeared from institute E across 2013-2017 were 1530, 1886, 1806, 1478 and 1645. What is the average number that appeared?Read the answer and worked solution →By what percentage do the total sales differ between Year 1 and Year 3? (Year 1 totals 15 + 12 + 9; Year 3 totals 14 + 15 + 13, figures in lakh rupees.)Read the answer and worked solution →The probability of drawing a king from a standard deck of 52 cards is:Read the answer and worked solution →Two dice are thrown. Probability of getting a sum of 7:Read the answer and worked solution →

Worked practice questions

Candidates who appeared from institute E across 2013-2017 were 1530, 1886, 1806, 1478 and 1645. What is the average number that appeared?

  1. 1586
  2. 1759
  3. 1924
  4. 1669
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Correct answer: D. 1669

1. Sum = 1530 + 1886 + 1806 + 1478 + 1645 = 8345. 2. There are 5 years, so divide by 5. 3. Average = 8345 ÷ 5 = **1669**. _Source: IBPS RRB Officer Scale I Prelims PYQ (Examrace), Q.57_

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By what percentage do the total sales differ between Year 1 and Year 3? (Year 1 totals 15 + 12 + 9; Year 3 totals 14 + 15 + 13, figures in lakh rupees.)

  1. 18%
  2. 15.67%
  3. 19.67%
  4. 16.67%
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Correct answer: D. 16.67%

1. Year 1 total = 15 + 12 + 9 = 36; Year 3 total = 14 + 15 + 13 = 42. 2. Difference = 42 − 36 = 6. 3. Percentage = 6/36 × 100 = 16.67%. _Source: RRB Group D CEN-02/2018 PYQ, Q.58._

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The probability of drawing a king from a standard deck of 52 cards is:

  1. 1/13
  2. 1/52
  3. 4/13
  4. 1/4
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Correct answer: A. 1/13

1. A standard deck has 52 cards, 4 of which are kings. 2. Probability = favourable / total = 4/52. 3. Simplify = 1/13. _Source: KMAT Karnataka 2022 PYQ Q.70_

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