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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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Q251. If 3x + 18 = 51, find x.

  1. 12
  2. 13
  3. 10
  4. 11
Show answer and explanation

Correct answer: D. 11

3x = 33, so x = 11.

Q252. 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.

Q253. Find the area of a rectangle with length 6 cm and breadth 3 cm (in sq cm).

  1. 24
  2. 9
  3. 18
  4. 15
Show answer and explanation

Correct answer: C. 18

Area = l x b = 18.

Q254. What is 9.0 + 5.7?

  1. 14.6
  2. 14.8
  3. 15.7
  4. 14.7
Show answer and explanation

Correct answer: D. 14.7

9.0 + 5.7 = 14.7.

Q255. What is the cube of 7?

  1. 392
  2. 343
  3. 350
  4. 336
Show answer and explanation

Correct answer: B. 343

7^3 = 343.

Q256. What is the square root of 1296?

  1. 37
  2. 35
  3. 36
  4. 38
Show answer and explanation

Correct answer: C. 36

36 x 36 = 1296, so the root is 36.

Q257. Roman numeral for 50 is:

  1. D
  2. L
  3. X
  4. C
Show answer and explanation

Correct answer: B. L

L = 50, C = 100, D = 500, X = 10.

Q258. The average of 4 numbers is 48. If 3 of them are 53, 57, 42, what is the remaining number?

  1. 41
  2. 39
  3. 45
  4. 40
Show answer and explanation

Correct answer: D. 40

Total = 48x4 = 192; remaining = 192-152 = 40.

Q259. In a right-angled triangle, the two legs are 20 cm and 21 cm. Find the hypotenuse (in cm).

  1. 30
  2. 28
  3. 41
  4. 29
Show answer and explanation

Correct answer: D. 29

Hypotenuse = sqrt(20^2+21^2) = 29.

Q260. If 5 pens cost Rs. 300, what is the cost of 1 pen (in Rs.)?

  1. 60
  2. 65
  3. 120
  4. 55
Show answer and explanation

Correct answer: A. 60

300/5 = 60.

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