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Clerical & Administrative Mathematics MCQs with Answers

86 practice MCQs on Mathematics for Clerical & Administrative tests. Think of your answer first, then open "Show answer and explanation". These are practice questions, not official examination papers.

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Q81. A can finish a job in 9 days and B in 18 days. How many days will they take working together?

  1. 27
  2. 7
  3. 6
  4. 8
Show answer and explanation

Correct answer: C. 6

Combined rate = 1/9 + 1/18; time = 162/27.

Q82. In a right-angled triangle, the two legs are 7 cm and 24 cm. Find the hypotenuse (in cm).

  1. 31
  2. 26
  3. 25
  4. 24
Show answer and explanation

Correct answer: C. 25

Hypotenuse = sqrt(7^2+24^2) = 25.

Q83. What is 77 x 45?

  1. 3495
  2. 3465
  3. 3475
  4. 3515
Show answer and explanation

Correct answer: B. 3465

77 x 45 = 3465.

Q84. Simplify: (4+1)^2 - (4-1)^2

  1. 8
  2. 32
  3. 16
  4. 18
Show answer and explanation

Correct answer: C. 16

Using (p+q)^2-(p-q)^2 = 4pq = 4a.

Q85. Roman numeral XL equals:

  1. 90
  2. 40
  3. 60
  4. 14
Show answer and explanation

Correct answer: B. 40

XL = 50-10 = 40.

Q86. What is the sum of first 10 even natural numbers?

  1. 90
  2. 110
  3. 55
  4. 100
Show answer and explanation

Correct answer: B. 110

n(n+1) = 10x11 = 110.

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