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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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Q41. Find the volume of a cube of side 8 cm (in cubic cm).

  1. 520
  2. 512
  3. 384
  4. 64
Show answer and explanation

Correct answer: B. 512

Volume = side^3 = 512.

Q42. What is the HCF of 16 and 8?

  1. 16
  2. 8
  3. 10
  4. 9
Show answer and explanation

Correct answer: B. 8

The greatest common divisor of 16 and 8 is 8.

Q43. Find the simple interest on Rs. 20000 at 5% per annum for 4 years (in Rs.).

  1. 3900
  2. 4100
  3. 4000
  4. 8000
Show answer and explanation

Correct answer: C. 4000

SI = PRT/100 = 20000 x 5 x 4/100 = 4000.

Q44. Find the simple interest on Rs. 1000 at 12% per annum for 4 years (in Rs.).

  1. 380
  2. 580
  3. 480
  4. 960
Show answer and explanation

Correct answer: C. 480

SI = PRT/100 = 1000 x 12 x 4/100 = 480.

Q45. What is the probability of getting a 6 when a fair die is thrown?

  1. 1/12
  2. 1/2
  3. 1/3
  4. 1/6
Show answer and explanation

Correct answer: D. 1/6

One favourable outcome among six.

Q46. An item bought for Rs. 200 is sold at 40% profit. What is the selling price in Rs.?

  1. 300
  2. 280
  3. 240
  4. 260
Show answer and explanation

Correct answer: B. 280

SP = 200 x 140/100 = 280.

Q47. If x + y = 10 and x - y = -8, find x.

  1. 9
  2. 1
  3. 2
  4. 0
Show answer and explanation

Correct answer: B. 1

Adding the equations: 2x = 2; x = 1.

Q48. Find the volume of a cube of side 3 cm (in cubic cm).

  1. 30
  2. 54
  3. 27
  4. 9
Show answer and explanation

Correct answer: C. 27

Volume = side^3 = 27.

Q49. A father is 32 years old and his son is 10. What will be the sum of their ages after 5 years?

  1. 57
  2. 47
  3. 42
  4. 52
Show answer and explanation

Correct answer: D. 52

Sum now = 42; after 5 years add 2x5.

Q50. What is the unit digit of 7^4?

  1. 3
  2. 9
  3. 7
  4. 1
Show answer and explanation

Correct answer: D. 1

7^4 = 2401, unit digit 1.

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