Simplification & Approximation

Ladakh Police Constable · Mathematics · 100 practice questions with answers and explanations: 67 Easy, 33 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Simplify: 100 - (20 + 30)/2

  1. 80
  2. 70
  3. 65
  4. 75
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Answer: D. (20+30)/2 = 25, so 100 - 25 = 75.

Sample Easy question 2

Simplify: 15 × 4 - 20 ÷ 5

  1. 58
  2. 54
  3. 50
  4. 56
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Answer: D. By BODMAS: 60 - 4 = 56.

Sample Easy question 3

Simplify: (8 + 12) × 2 - 10

  1. 30
  2. 28
  3. 26
  4. 32
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Answer: A. 20 × 2 = 40, then 40 - 10 = 30.

Sample Medium question 4

Find the approximate value of 39.98% of 250.06.

  1. 95
  2. 100
  3. 90
  4. 105
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Answer: B. Approximating: 40% of 250 = 100.

Sample Medium question 5

Simplify: 5/6 - 1/3 + 1/2

  1. 0.5
  2. 1.25
  3. 0.75
  4. 1
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Answer: D. LCD 6: 5/6 - 2/6 + 3/6 = 6/6 = 1.

Sample Medium question 6

Find the approximate value of 15.98 × 4.02.

  1. 60
  2. 66
  3. 62
  4. 64
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Answer: D. Approximating: 16 × 4 = 64.

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