Ultimate Hard Math Brain Teasers
Test your numerical wit with six demanding riddles that require sharp reasoning and clever calculations.
Quiz Questions
Answer all questions below and test your knowledge.
- 1
A number is multiplied by 7, then 5 is subtracted, giving 58. What was the original number?
- 2
Find the smallest positive integer that leaves remainder 3 when divided by 5 and remainder 4 when divided by 7.
- 3
A rectangle has integer side lengths. Its area is 210 and its perimeter is 62. What is the length of the longer side?
- 4
A square and a circle have the same perimeter. If the circle’s radius is 5, what is the side length of the square? (Use π≈3.14)
- 5
In a sequence, each term after the first is the sum of the previous term and the square of its position (starting count at 1). If the first term is 2, what is the fourth term?
- 6
A number is equal to the sum of the factorials of its digits. Which two‑digit number satisfies this property?
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