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Mathematics MCQs with Answers

Mathematics and quantitative reasoning questions appear in many job and entry tests. Practice arithmetic, algebra, percentages, ratios, averages, profit and loss, and geometry. Attempt timed MCQ tests to improve both your speed and accuracy.

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Q131. What is the supplement of 45 degrees?

  1. 135 degrees
  2. 145 degrees
  3. 125 degrees
  4. 45 degrees
Show answer and explanation

Correct answer: A. 135 degrees

Supplementary angles add to 180: 180-45 = 135.

Q132. Find the area of a rectangle with length 20 cm and breadth 14 cm (in sq cm).

  1. 280
  2. 68
  3. 300
  4. 266
Show answer and explanation

Correct answer: A. 280

Area = l x b = 280.

Q133. What is the circumference of a circle of radius 35 cm? (use pi = 22/7)

  1. 110
  2. 220
  3. 255
  4. 3850
Show answer and explanation

Correct answer: B. 220

Circumference = 2 pi r = 220.

Q134. Find the next number: 49, 64, 81, 100, 121, ?

  1. 146
  2. 143
  3. 144
  4. 145
Show answer and explanation

Correct answer: C. 144

The series is of consecutive squares.

Q135. What is the square of 22?

  1. 506
  2. 462
  3. 528
  4. 484
Show answer and explanation

Correct answer: D. 484

22 x 22 = 484.

Q136. The marked price of an article is Rs. 1000. After a discount of 20%, what is the selling price in Rs.?

  1. 980
  2. 850
  3. 800
  4. 750
Show answer and explanation

Correct answer: C. 800

SP = 1000 x 80/100 = 800.

Q137. If 5x + 16 = 36, find x.

  1. 6
  2. 4
  3. 3
  4. 5
Show answer and explanation

Correct answer: B. 4

5x = 20, so x = 4.

Q138. What is 3/8 as a decimal?

  1. 0.375
  2. 0.325
  3. 0.35
  4. 0.38
Show answer and explanation

Correct answer: A. 0.375

3 divided by 8 = 0.375.

Q139. What is the area of a circle of radius 21 cm? (use pi = 22/7)

  1. 1386
  2. 693
  3. 1407
  4. 132
Show answer and explanation

Correct answer: A. 1386

Area = pi r^2 = 22/7 x 21^2 = 1386.

Q140. If 8 kg of sugar costs Rs. 240, find the cost of 10 kg (in Rs.).

  1. 310
  2. 330
  3. 270
  4. 300
Show answer and explanation

Correct answer: D. 300

Cost of 1 kg = 30; for 10 kg = 300.

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