A quiz is ten arithmetic questions, each with four answer buttons and a ten second timer. Pick an answer before the bar empties; the correct button is then highlighted, the feedback line says what you scored, and the next question follows about a second later. After the tenth question the quiz ends with a total and a grade.
A correct answer is worth 10 points plus twice the seconds left on the timer, so an instant answer pays up to 30 and a last-moment one pays 10. A wrong answer or a timeout scores nothing and resets the streak, but never subtracts. The final total is shown against a 100 point scale with a grade: A from 80, B from 60, C from 40 and D below. Because speed bonuses stack, a fast run can finish above 100.
Ten questions, each with its own ten second limit, so at most a little under two minutes.
No. Division questions are built backwards from a whole number, so every one divides exactly.
Yes. On a touch screen the game shows on-screen buttons, and games played with a mouse work by tapping.