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NTS / PTS Mathematics MCQs with Answers

87 practice MCQs on Mathematics for NTS / PTS tests. Think of your answer first, then open "Show answer and explanation". These are practice questions, not official examination papers.

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Q51. If x + y = 21 and x - y = 1, find x.

  1. 21
  2. 11
  3. 10
  4. 12
Show answer and explanation

Correct answer: B. 11

Adding the equations: 2x = 22; x = 11.

Q52. What is 73 x 98?

  1. 7054
  2. 7184
  3. 7154
  4. 7114
Show answer and explanation

Correct answer: C. 7154

73 x 98 = 7154.

Q53. If 9x + 18 = 45, find x.

  1. 5
  2. 4
  3. 3
  4. 2
Show answer and explanation

Correct answer: C. 3

9x = 27, so x = 3.

Q54. Find the simple interest on Rs. 8000 at 10% per annum for 4 years (in Rs.).

  1. 3300
  2. 6400
  3. 3200
  4. 3100
Show answer and explanation

Correct answer: C. 3200

SI = PRT/100 = 8000 x 10 x 4/100 = 3200.

Q55. Find the total surface area of a cube of side 10 cm (in sq cm).

  1. 600
  2. 60
  3. 1000
  4. 400
Show answer and explanation

Correct answer: A. 600

TSA = 6 x side^2 = 600.

Q56. What is 64 x 30?

  1. 1890
  2. 1940
  3. 1900
  4. 1920
Show answer and explanation

Correct answer: D. 1920

64 x 30 = 1920.

Q57. What is the supplement of 75 degrees?

  1. 115 degrees
  2. 105 degrees
  3. 15 degrees
  4. 95 degrees
Show answer and explanation

Correct answer: B. 105 degrees

Supplementary angles add to 180: 180-75 = 105.

Q58. What is the square root of 1024?

  1. 32
  2. 34
  3. 31
  4. 33
Show answer and explanation

Correct answer: A. 32

32 x 32 = 1024, so the root is 32.

Q59. What is the sum of interior angles of a polygon with 8 sides?

  1. 1440 degrees
  2. 1170 degrees
  3. 1080 degrees
  4. 1260 degrees
Show answer and explanation

Correct answer: C. 1080 degrees

Sum = (n-2) x 180 = 1080.

Q60. Find the simple interest on Rs. 1000 at 5% per annum for 3 years (in Rs.).

  1. 250
  2. 50
  3. 300
  4. 150
Show answer and explanation

Correct answer: D. 150

SI = PRT/100 = 1000 x 5 x 3/100 = 150.

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