Math Tug of War

Each team types its answer on its number pad, then presses PULL ⚡.

• Right answer: the rope moves one pull toward your team.
• Wrong answer: the rope moves half a pull toward the other team.
• The first team to reach its side wins. It takes a lead of 5 pulls from the center.
• Same series: teams get the same calculations in the same order, each at its own pace. Each operation stays on screen until its team answers correctly. The other team’s answer does not change it.
• Different questions: each team keeps its own calculation.
• Number pad or answer choices: choose in “New game” or with the 🔢 / 👆 button at the top of the screen. With choices, tap the right answer out of 4; a wrong answer is crossed out and gives the other team half a pull. On a keyboard, keys 1 to 4 choose an answer.

Choosing the calculations: use the six buttons at the top of the screen. Addition level 1: answers up to 20; level 2: numbers from 10 to 99. Subtraction level 1: numbers up to 20; level 2: numbers from 10 to 99, no negative answers. Multiplication and division: tables from 2 to 10, with exact divisions. Changing the button during a game applies after each team’s right answer.

With a keyboard: click a team’s name or its answer box. Type the digits, then Enter. Backspace deletes a digit and Esc clears the answer. Tab moves through the controls. On a multi-touch screen, both teams can use their pads at the same time. Keys react as soon as a finger or pen touches them, without waiting for the other player to let go. The board must support at least two simultaneous touches.

The robot: it tries an answer about every 3 seconds and can make mistakes. Pausing or opening a window stops its attempts.

No Internet? just open this HTML file in a recent browser. You can copy it to a USB stick. Images, sounds and the game are included.