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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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Q161. What is 6.0 + 7.8?

  1. 13.7
  2. 13.8
  3. 13.9
  4. 14.8
Show answer and explanation

Correct answer: B. 13.8

6.0 + 7.8 = 13.8.

Q162. The average of 5 numbers is 49. If 4 of them are 53, 53, 54, 51, what is the remaining number?

  1. 34
  2. 35
  3. 39
  4. 33
Show answer and explanation

Correct answer: A. 34

Total = 49x5 = 245; remaining = 245-211 = 34.

Q163. A shopkeeper buys a watch for Rs. 500 and sells it at a 20% loss. Find the selling price in Rs.

  1. 430
  2. 400
  3. 480
  4. 370
Show answer and explanation

Correct answer: B. 400

SP = 500 x 80/100 = 400.

Q164. A can finish a job in 12 days and B in 4 days. How many days will they take working together?

  1. 4
  2. 5
  3. 16
  4. 3
Show answer and explanation

Correct answer: D. 3

Combined rate = 1/12 + 1/4; time = 48/16.

Q165. What is the cube root of 125?

  1. 4
  2. 6
  3. 5
  4. 7
Show answer and explanation

Correct answer: C. 5

5^3 = 125.

Q166. A father is 47 years old and his son is 6. What will be the sum of their ages after 4 years?

  1. 57
  2. 61
  3. 53
  4. 65
Show answer and explanation

Correct answer: B. 61

Sum now = 53; after 4 years add 2x4.

Q167. Find the area of a triangle with base 4 cm and height 17 cm (in sq cm).

  1. 21
  2. 51
  3. 34
  4. 68
Show answer and explanation

Correct answer: C. 34

Area = 1/2 x base x height = 34.

Q168. If x + y = 16 and x - y = 2, find x.

  1. 8
  2. 10
  3. 7
  4. 9
Show answer and explanation

Correct answer: D. 9

Adding the equations: 2x = 18; x = 9.

Q169. Find the next number: 15, 24, 33, 42, 51, ?

  1. 59
  2. 60
  3. 61
  4. 69
Show answer and explanation

Correct answer: B. 60

The series increases by 9; next = 60.

Q170. The marked price of an article is Rs. 800. After a discount of 15%, what is the selling price in Rs.?

  1. 785
  2. 730
  3. 680
  4. 630
Show answer and explanation

Correct answer: C. 680

SP = 800 x 85/100 = 680.

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