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MCQ Practice

Mathematics MCQs

A sum of money doubles in 5 years at simple interest. In how many years will it become four times ____.

  • A. 10 years
  • B. 12 years
  • C. 15 years
  • D. 20 years
Explanation:
Doubling means 100% interest in 5 years → quadruple = 300% → 15 years.

A can do a piece of work in 15 days while B can do it in 20 days. They work together for 5 days. What fraction of work is left ____.

  • A. 1/4
  • B. 1/3
  • C. 1/2
  • D. 2/3
Explanation:
Work done = 5 × (1/15 + 1/20) = 7/12.

A can complete the work in 12 days and B in 18 days. In how many days will they complete the work together ____.

  • A. 6 days
  • B. 7.2 days
  • C. 8 days
  • D. 9 days
Explanation:
Combined work = (1/12 + 1/18) = 5/36 → time = 36/5.

A and B can complete work in 12 days; B and C in 15 days; C and A in 20 days. A alone time ____.

  • A. 20 days
  • B. 30 days
  • C. 40 days
  • D. None
Explanation:
Use the system of equations.

A and B can do the work in 15 and 10 days. If they start together and A leaves after some days, total time ____.

  • A. 8 days
  • B. 10 days
  • C. 12 days
  • D. 15 days
Explanation:
Solve with work fractions.

A and B are 5 cm apart. C lies between them, with AC = 3 cm. Ratio AC: CB ____.

  • A. 6%
  • B. 7%
  • C. 8%
  • D. 9%
Explanation:
CB = 2 cm.

A alone finishes work in 10 days, B in 15 days if they work together, total days ____.

  • A. 35
  • B. 40
  • C. 45
  • D. None
Explanation:
Combined work rate.

A 6% stock yields 8%. Market value of stock ____.

  • A. Rs. 48
  • B. Rs. 75
  • C. Rs. 96
  • D. Rs. 133.33
Explanation:
MV = (Dividend/Rate)×100.

A 25 cm wide path surrounds a circular garden of diameter 4 m. Area of path ____.

  • A. 3.34
  • B. 2
  • C. 4.5
  • D. 5.5
Explanation:
Use the difference between the areas of the circles.

96% of population = 23040. Find total population ____.

  • A. 32256
  • B. 24000
  • C. 24936
  • D. 25640
Explanation:
Total = 23040 / 0.96.