Simplification & Approximation

JKSSB Junior Engineer (Mechanical) · Mathematics · 100 practice questions with answers and explanations: 67 Easy, 33 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Find the cube of 9.

  1. 726
  2. 723
  3. 729
  4. 719
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Answer: C. 9³ = 729.

Sample Easy question 2

Find the square of 12.

  1. 134
  2. 138
  3. 144
  4. 141
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Answer: C. 12² = 144.

Sample Easy question 3

Find the square of 15.

  1. 225
  2. 215
  3. 222
  4. 220
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Answer: A. 15² = 225.

Sample Medium question 4

Simplify: 2½ + 3⅓

  1. 5⅚
  2. 5⅔
  3. 5⅓
  4. 5½
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Answer: A. 2½ + 3⅓ = 5/2 + 10/3 = 15/6 + 20/6 = 35/6 = 5⅚.

Sample Medium question 5

Simplify: 4¼ - 1½

  1. 3¼
  2. 3
  3. 2¾
  4. 2½
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Answer: C. 4¼ - 1½ = 17/4 - 3/2 = 17/4 - 6/4 = 11/4 = 2¾.

Sample Medium question 6

Find the approximate value of 63% of 300.

  1. 194
  2. 189
  3. 184
  4. 179
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Answer: B. 63% of 300 = 189.

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