Calculusmental math

Games and modes

Pick a game (what you solve), then a mode (how you win). Every game also combines a difficulty level and the operations picked by the lobby’s host.

Games

Mental math Find the result.

A calculation appears, you type its result. From “7 + 4” to “125 × 8 − 36 ÷ 4” depending on the level.

Playable in: Battle royale · Speed race

Right on target Some tiles, right on target.

Some tiles and a target: combine the tiles, each at most once (not necessarily all of them), to hit the target exactly. Each step you add becomes a new tile. There is always a solution; with several players, if nobody finds it, the closest scores when time runs out.

Playable in: Battle royale · Speed race

Missing number Complete the equation.

The result is given, but a number or an operator is missing from the calculation: “23 + ? = 41”, “12 ? 4 = 3”. Find what’s missing.

Playable in: Battle royale · Speed race

The bomb Rig a calculation, defuse someone else’s.

Everyone gets the same tiles and builds a calculation: their bomb. Once everyone is ready, each bomb goes to another player, who must find its result. One mistake and you’re out; if your bomb blows someone up, you score a point. Online, two players or more.

Playable in: Battle royale

Modes

Battle royale One mistake and you’re out.

Everyone gets the same calculation. A wrong answer or running out of time eliminates you. Time gets shorter every round. The last one standing wins; if every survivor misses the same round, nobody is out.

Speed race A point for the fastest.

For each calculation, the first correct answer scores the point. One answer per calculation: if you’re wrong, the round goes to the others. On a tie, the fastest overall wins.

All at once or taking turns

All at once: everyone sees the same calculation at the same time. Taking turns: one player answers while the others watch the answer being typed live. Only battle royale eliminates players.

The five levels

1 · Easy7 − 1
2 · Medium12 − 7
3 · Hard8 × 6
4 · Expert67 − (31 − 3)
5 · Legend61 − (23 − 17) − 45