Mental Math Sprint

Answer as many arithmetic problems as you can before the timer runs out. Choose the sprint length (30, 60 or 120 seconds), the operations (+, −, ×, ÷ or a mix) and the difficulty, which controls how big the numbers get.

Controls

• Type the answer with the on-screen number pad or your keyboard digits.
• A correct answer is accepted instantly — no need to press Enter.
• Press Enter (✔) to submit a different answer if you are stuck; a wrong answer is marked and a new problem appears. Backspace (⌫) deletes a digit.

Scoring

Each correct answer scores 10 points times your combo multiplier. Every 5 correct answers in a row raise the multiplier by one (up to ×5); a wrong answer resets it to ×1. Subtraction answers are never negative and division always comes out exact.

At the end you get a summary with your score, accuracy, longest streak and average time per answer. The best score for every combination of time, operation and difficulty is saved separately.