Data Interpretation

J&K Bank PO · Quantitative Aptitude · 100 practice questions with answers and explanations: 38 Easy, 62 Medium, 0 Hard.

Sample questions

Sample Easy question 1

In a school of 900 students, 45% are girls. How many are boys?

  1. 492
  2. 495
  3. 490
  4. 498
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Answer: B. Girls = 45% of 900 = 405, boys = 900 - 405 = 495.

Sample Easy question 2

A factory's output rose from 250 to 300 units. Find the percentage increase.

  1. 24%
  2. 18%
  3. 20%
  4. 22%
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Answer: C. Increase = 50, percentage = 50/250 × 100 = 20%.

Sample Easy question 3

A company's staff strength dropped from 150 to 135. Find the percentage decrease.

  1. 10%
  2. 9%
  3. 8%
  4. 11%
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Answer: A. Decrease = 15, percentage = 15/150 × 100 = 10%.

Sample Medium question 4

A city's population increased by 10% in year 1 and by a further 10% in year 2. If the initial population was 1,00,000, find the population after year 2.

  1. 1,22,000
  2. 1,19,000
  3. 1,21,000
  4. 1,18,000
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Answer: C. After year 1: 1,10,000. After year 2: 1,10,000 × 1.1 = 1,21,000.

Sample Medium question 5

A city's population decreased by 5% in year 1 and increased by 10% in year 2. If the initial population was 2,00,000, find the population after year 2.

  1. 2,10,000
  2. 2,09,000
  3. 2,08,000
  4. 2,11,000
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Answer: D. After year 1: 1,90,000. After year 2: 1,90,000 × 1.1 = 2,09,000.

Sample Medium question 6

In a college of 800 students, 35% study Science. Among Science students, 30% also take an extra course. How many take the extra course?

  1. 87
  2. 84
  3. 81
  4. 78
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Answer: B. Science students = 35% of 800 = 280; extra course = 30% of 280 = 84.

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