3500+ Math MCQ Questions with answers and solution

Q. A man spends 80% of his income. If his income increases by 25% and his expenditure remains the same, what percentage of his new income does he save?

(A) 20%
(B) 30%
(C) 36%
(D) 40%

📝 Notes

✅ Correct Answer: (C) 36%

Explanation: Assume income = ₹100. Expenditure = ₹80. New income = ₹125. Savings = ₹45. Savings percentage = (45/125) × 100 = 36%.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 09:06 am in Math

Q. A candidate scores 48% marks and fails by 24 marks. Another candidate scores 60% marks and gets 48 marks more than the passing marks. The passing percentage is:

(A) 50%
(B) 52%
(C) 54%
(D) 55%

📝 Notes

✅ Correct Answer: (B) 52%

Explanation: Difference in marks = 24 + 48 = 72 = 12% of total marks. Total marks = 72 × 100 / 12 = 600. Passing marks = 48% of 600 + 24 = 312 = 52% of 600.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

Q. The price of rice is increased by 20%. By what percentage should a family reduce its consumption so that the expenditure increases by only 8%?

(A) 8%
(B) 10%
(C) 12%
(D) 15%

📝 Notes

✅ Correct Answer: (B) 10%

Explanation: Required consumption = 108/120 = 90% of the original. Hence, reduction = 10%.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

Q. A person's salary is increased by 10% and then by another 20%. By what percentage should it now be reduced to reach the original salary?

(A) 24.24%
(B) 25%
(C) 26.67%
(D) 28%

📝 Notes

✅ Correct Answer: (A) 24.24%

Explanation: New salary = 1.10 × 1.20 = 1.32 times the original. Required reduction = (32/132) × 100 = 24.24%.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

Q. The population of a town decreases by 10% in the first year and by another 20% in the second year. The overall percentage decrease is:

(A) 28%
(B) 30%
(C) 32%
(D) 35%

📝 Notes

✅ Correct Answer: (A) 28%

Explanation: Remaining population = 90% × 80% = 72%. Therefore, net decrease = 28%.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

Q. If A is 30% more than B and B is 20% more than C, then A is what percent more than C?

(A) 50%
(B) 54%
(C) 56%
(D) 60%

📝 Notes

✅ Correct Answer: (C) 56%

Explanation: Let C = 100. Then B = 120 and A = 156. Hence, A is 56% more than C.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

Q. A trader marks an article 50% above the cost price and allows two successive discounts of 20% and 10%. His profit percentage is:

(A) 6%
(B) 8%
(C) 10%
(D) 12%

📝 Notes

✅ Correct Answer: (B) 8%

Explanation: Assume CP = ₹100. MP = ₹150. Selling price = 150 × 0.8 × 0.9 = ₹108. Profit = 8%.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

Q. The value of an investment increases by 25% in the first year and decreases by 20% in the second year. Compared to the original investment, the final value is:

(A) 5% more
(B) No change
(C) 5% less
(D) 2% more

📝 Notes

✅ Correct Answer: (B) No change

Explanation: Assume investment = 100. After a 25% increase it becomes 125. After a 20% decrease it becomes 100. Hence, there is no net change.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

Q. A student answers 80% of the questions correctly. If there are 250 questions in the test, the number of incorrect answers is:

(A) 40
(B) 45
(C) 50
(D) 60

📝 Notes

✅ Correct Answer: (C) 50

Explanation: Correct answers = 80% of 250 = 200. Incorrect answers = 250 − 200 = 50.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

Q. A man's expenditure is 75% of his income. If his income increases by 20% while expenditure remains unchanged, what percentage of his new income does he save?

(A) 30%
(B) 35%
(C) 37.5%
(D) 40%

📝 Notes

✅ Correct Answer: (C) 37.5%

Explanation: Assume income = ₹100. Expenditure = ₹75. New income = ₹120. Savings = ₹45. Savings percentage = (45/120) × 100 = 37.5%.

Published by Mr. Dubey ⭐ 109.86K Points at 25-Jul-2026 03:57 pm in Math

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