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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📊 Math
Q. How many sides does a polygon have if the sum of interior angles is 720°?
  • (A) 4
  • (B) 5
  • (C) 6
  • (D) 7
💬 Discuss
✅ Correct Answer: (C) 6

Explanation: Sum of angles = (n − 2) × 180 = 720 → n = 6.

📊 Math
Q. What is the LCM of 12 and 18?
  • (A) 24
  • (B) 36
  • (C) 48
  • (D) 60
💬 Discuss
✅ Correct Answer: (B) 36

Explanation: LCM of 12 and 18 = 36.

📊 Math
Q. A train travels 180 km in 3 hours. What is its speed?
  • (A) 40 km/h
  • (B) 50 km/h
  • (C) 60 km/h
  • (D) 70 km/h
💬 Discuss
✅ Correct Answer: (C) 60 km/h

Explanation: Speed = Distance / Time = 180 / 3 = 60 km/h.

📊 Math
Q. What is 20% of 125?
  • (A) 20
  • (B) 22
  • (C) 25
  • (D) 30
💬 Discuss
✅ Correct Answer: (C) 25

Explanation: (20/100) × 125 = 25.

📊 Math
Q. If 8 workers finish a task in 12 days, how long will 6 workers take?
  • (A) 12 days
  • (B) 14 days
  • (C) 16 days
  • (D) 18 days
💬 Discuss
✅ Correct Answer: (C) 16 days

Explanation: Work ∝ 1/workers. (8 × 12) = (6 × x) → x = 16.

📊 Math
Q. Which of the following is the smallest fraction?
  • (A) 3/5
  • (B) 4/7
  • (C) 5/8
  • (D) 6/11
💬 Discuss
✅ Correct Answer: (B) 4/7

Explanation: Among the options, 4/7 gives the smallest decimal value.

📊 Math
Q. What is the simple interest on ₹5000 at 8% per annum for 2 years?
  • (A) ₹600
  • (B) ₹650
  • (C) ₹800
  • (D) ₹900
💬 Discuss
✅ Correct Answer: (C) ₹800

Explanation: (P × R × T) / 100 = (5000 × 8 × 2) / 100 = 800.

📊 Math
Q. A man bought a watch for ₹750 and sold it for ₹900. His gain percentage is:
  • (A) 15%
  • (B) 18%
  • (C) 20%
  • (D) 25%
💬 Discuss
✅ Correct Answer: (C) 20%

Explanation: Profit = 900 - 750 = 150 → (150 / 750) × 100 = 20%.

📊 Math
Q. The perimeter of a rectangle is 60 cm. If its length is 18 cm, what is its breadth?
  • (A) 10 cm
  • (B) 11 cm
  • (C) 12 cm
  • (D) 15 cm
💬 Discuss
✅ Correct Answer: (C) 12 cm

Explanation: 2(L + B) = 60 → L + B = 30 → 18 + B = 30 → B = 12.

📊 Math
Q. If a number is reduced by 20%, the new value becomes 240. What was the original number?
  • (A) 260
  • (B) 280
  • (C) 300
  • (D) 320
💬 Discuss
✅ Correct Answer: (C) 300

Explanation: After 20% reduction → 80% = 240 → Original = 240 / 0.8 = 300.

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