Math MCQ Questions with answers

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Here Important Math MCQ questions are added which are frequently asked in almost all the examinations. You can check the correct answer of any question on clicking the show answer button. The Correct answer will be displayed below. You can share any question with your friends on whatsapp by tapping Share button.

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Q. A can complete a work in 15 days and B in 10 days. After working together for 3 days, what fraction of the work remains?

  • (A) 1/2
  • (B) 3/10
  • (C) 1/5
  • (D) 2/5
📝 Notes
✅ Correct Answer: (A) 1/2
Explanation: Together they complete 1/15 + 1/10 = 1/6 per day. In 3 days they complete 1/2. Remaining = 1/2.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:19 am in Math

Q. A can complete a work in 8 days while B can complete it in 24 days. How many days will they take together?

  • (A) 4 days
  • (B) 5 days
  • (C) 6 days
  • (D) 8 days
📝 Notes
✅ Correct Answer: (C) 6 days
Explanation: Combined work per day = 1/8 + 1/24 = 1/6. Time = 6 days.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:19 am in Math

Q. A can complete 2/5 of a work in 8 days. How many days will A take to complete the whole work?

  • (A) 16 days
  • (B) 18 days
  • (C) 20 days
  • (D) 22 days
📝 Notes
✅ Correct Answer: (C) 20 days
Explanation: Whole work = 8 × 5/2 = 20 days.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:19 am in Math

Q. A completes a work in 20 days. B is 25% more efficient than A. In how many days can B complete the work?

  • (A) 15 days
  • (B) 16 days
  • (C) 18 days
  • (D) 25 days
📝 Notes
✅ Correct Answer: (B) 16 days
Explanation: B's efficiency = 125% of A. Time = 20 × 100/125 = 16 days.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:19 am in Math

Q. A and B together complete a work in 12 days. If A alone can complete it in 20 days, then B alone can complete it in:

  • (A) 24 days
  • (B) 30 days
  • (C) 36 days
  • (D) 40 days
📝 Notes
✅ Correct Answer: (B) 30 days
Explanation: B's work/day = 1/12 − 1/20 = 1/30. Hence B takes 30 days.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:19 am in Math

Q. A can complete a work in 30 days. He works for 12 days and leaves. What fraction of the work is left?

  • (A) 2/5
  • (B) 3/5
  • (C) 1/5
  • (D) 4/5
📝 Notes
✅ Correct Answer: (B) 3/5
Explanation: Completed = 12/30 = 2/5. Remaining = 3/5.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:19 am in Math

Q. A can complete 1/3 of a work in 6 days and B can complete 1/2 of the same work in 9 days. In how many days can both together complete the work?

  • (A) 10.8 days
  • (B) 12 days
  • (C) 9 days
  • (D) 15 days
📝 Notes
✅ Correct Answer: (C) 9 days
Explanation: A's rate = 1/18, B's rate = 1/18. Together = 1/9. Time = 9 days.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:19 am in Math

Q. A can complete a work in 24 days. B can complete the same work in 16 days. If both work together for 8 days, what fraction of the work is completed?

  • (A) 2/3
  • (B) 5/6
  • (C) 3/4
  • (D) 7/8
📝 Notes
✅ Correct Answer: (B) 5/6
Explanation: Combined rate = 1/24 + 1/16 = 5/48. In 8 days, work completed = 40/48 = 5/6.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:19 am in Math

Q. A can complete a work in 16 days and B in 24 days. How many days will they take together to complete the work?

  • (A) 8.6 days
  • (B) 9.6 days
  • (C) 10 days
  • (D) 12 days
📝 Notes
✅ Correct Answer: (B) 9.6 days
Explanation: Combined rate = 1/16 + 1/24 = 5/48. Time = 48/5 = 9.6 days.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:20 am in Math

Q. A completes a work in 25 days while B completes it in 20 days. Working together, they will finish the work in:

  • (A) 10 days
  • (B) 11.11 days
  • (C) 12.5 days
  • (D) 15 days
📝 Notes
✅ Correct Answer: (B) 11.11 days
Explanation: Combined rate = 1/25 + 1/20 = 9/100. Time = 100/9 = 11.11 days.

Published by Deepak Sahoo ⭐ 11.23K Points at 21-Jul-2026 06:20 am in Math

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