Extreme Numerical Brain Teasers for Experts
Five rigorous puzzles blend algebraic insight with logical deduction, offering a true test for seasoned problem solvers.
Quiz Questions
Answer all questions below and test your knowledge.
- 1
I am a three‑digit number. My tens digit is twice my ones digit, and the sum of all digits equals 12. What number am I?
- 2
A rectangular garden has a perimeter of 84 meters. If its length exceeds its width by 10 meters, what is the area?
- 3
Find the smallest positive integer that leaves a remainder of 3 when divided by 7, a remainder of 5 when divided by 9, and a remainder of 7 when divided by 11.
- 4
A sequence starts with 2, and each subsequent term is three times the previous term minus 1. What is the 5th term?
- 5
In a certain code, each letter is replaced by its position in the alphabet multiplied by 2 and then increased by 3. If the coded number for a letter is 47, which letter was originally encoded?
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