Math Quiz for Kids – Detective Mehul (Quiz 2)
This quiz contains 10 fun detective-style math questions designed for kids aged 10–12.
Case 11: The Missing Loot
The thief hid the money in a safe. The code is: (3³) − (2³).
Correct Answer: 19
Explanation: 3³ = 27, 2³ = 8 → 27 − 8 = 19.
Case 12: The Speeding Getaway
Aadi chases a suspect car traveling at 60 km per hour for 1.5 hours.
Correct Answer: 90 km
Explanation: Distance = Speed × Time = 60 × 1.5 = 90 km.
Case 13: The Profit Scheme
A shopkeeper buys a spy camera for ₹200 and sells it for ₹250.
Correct Answer: 25%
Explanation: Profit = ₹50 → (50 ÷ 200) × 100 = 25%.
Case 14: The Synchronized Alarms
One alarm rings every 12 minutes and another every 15 minutes.
Correct Answer: 60 minutes
Explanation: LCM of 12 and 15 is 60.
Case 15: The Evidence Ratio
₹1000 is divided in the ratio 2 : 3 : 5.
Correct Answer: ₹500
Explanation: Total parts = 10 → Each part = ₹100 → Largest share = 5 × 100.
Case 16: The Area Trap
A triangular room has a base of 12 m and height of 5 m.
Correct Answer: 30 sq meters
Explanation: Area = ½ × 12 × 5 = 30.
Case 17: The Mystery Number
One-third of a number is 12.
Correct Answer: 18
Explanation: Number = 36 → 50% of 36 = 18.
Case 18: The Missing Average
The average weight of three people is 60 kg.
Correct Answer: 60 kg
Explanation: Total = 180 kg → Aadi = 180 − (70 + 50) = 60.
Case 19: The Discount Double
A ₹100 gadget is increased by 10% and then decreased by 10%.
Correct Answer: ₹99
Explanation: ₹100 → ₹110 → ₹99.
Case 20: The Fibonacci Code
Complete the sequence: 1, 1, 2, 3, 5, 8, …
Correct Answer: 13
Explanation: Each number is the sum of the previous two.