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JKSSB Junior Engineer (Mechanical) · Mathematics · 100 practice questions with answers and explanations: 50 Easy, 50 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Find the circumference of a circle with radius 42 cm. (Use π = 22/7.)

  1. 264
  2. 258
  3. 261
  4. 267
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Answer: A. Circumference = 2 × (22/7) × 42 = 264 cm.

Sample Easy question 2

Find the area of a circle with radius 7 cm. (Use π = 22/7.)

  1. 157
  2. 154
  3. 151
  4. 148
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Answer: B. Area = (22/7) × 49 = 154 cm².

Sample Easy question 3

Find the area of a circle with radius 28 cm. (Use π = 22/7.)

  1. 2458
  2. 2467
  3. 2461
  4. 2464
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Answer: D. Area = (22/7) × 784 = 2464 cm².

Sample Medium question 4

Find the area of a rhombus with diagonals 18 cm and 10 cm.

  1. 90
  2. 87
  3. 93
  4. 84
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Answer: A. Area = (1/2) × 18 × 10 = 90 cm².

Sample Medium question 5

The volume of a cube is 343 cm³. Find its side length.

  1. 7 cm
  2. 6 cm
  3. 8 cm
  4. 5 cm
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Answer: A. Side = ∛343 = 7 cm.

Sample Medium question 6

The volume of a cube is 1000 cm³. Find its side length.

  1. 10 cm
  2. 9 cm
  3. 11 cm
  4. 8 cm
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Answer: A. Side = ∛1000 = 10 cm.

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