Easy
Math 24
Math 24 is a survival-based mental challenge inspired Optiver's online assessment. It tests the exact skills that matter in high-performance environments: speed, precision, and creative problem-solving under pressure. Can you turn four numbers into 24 using only arithmetic operations?
How to play
- 1.You'll be shown 4 numbers. Build an expression using +, −, ×, ÷ and parentheses that uses each number exactly once and equals 24.
- 2.The run has 50 puzzles; 10 at each difficulty: Cooked, Easy, Medium, Hard, Cracked.
- 3.One wrong answer ends the run. Survival mode; no second chances.
- 4.No per-puzzle timer, but a stopwatch runs from the first puzzle to your final answer.
- 5.Your score combines how many puzzles you solved with how long it took. Accuracy first, speed as the tiebreaker.
- 6.You can use your keyboard to enter numbers and operators (+-*/). Reset your current expression to revert the current puzzle without penalty.