Algebra

JKSSB Sub-Inspector (Telecommunication) · Basic Numeracy · 47 practice questions with answers and explanations: 11 Easy, 19 Medium, 17 Hard.

Sample questions

Sample Easy question 1

If 3x - 7 = 11, find x.

  1. 5
  2. 6
  3. 7
  4. 8
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Answer: B. 3x = 18, so x = 6.

Sample Medium question 2

Solve for x: x² - 9x + 20 = 0. Find the smaller root.

  1. 3
  2. 4
  3. 5
  4. 6
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Answer: B. Factoring: (x-4)(x-5) = 0, so the roots are 4 and 5; the smaller is 4.

Sample Hard question 3

If x - 1/x = 4, find the value of x² + 1/x².

  1. 14
  2. 16
  3. 18
  4. 20
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Answer: C. x² + 1/x² = (x - 1/x)² + 2 = 16 + 2 = 18.

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