Goal

A sum appears with four possible answers. Tap the right one as fast as you can. Solve as many as you can in 60 seconds.

Levels

• You start with simple addition. Subtraction, multiplication and division join one at a time.
• 5 right answers at a level moves you up; 2 wrong in a row moves you down a level.
• The numbers grow slowly: by level 10 it's two-digit multiplication.

Scoring

A right answer earns 4 + 2 × the level. A wrong answer costs 3 + the level, so guessing never pays. Get 5 in a row to build a streak.

Number Fluency

Quick, accurate mental arithmetic frees working memory for bigger problems — from splitting a bill to estimating a budget.

Processing Speed

Reading a sum, solving it and picking the answer in under two seconds trains the speed at which you take in and act on information.