A mental math training program inspired by techniques used by Arthur Benjamin. The techniques are explained in depth in the book Secrets of Mental Math by Arthur Benjamin and Michael Shermer.
The program generates math problems, checks answers and measures answer speed. The types of math problems are chosen randomly - answering might seem harder at first but this approach (called mixed practice) improves recognition of different problem types in the long term.
- Two digit multiplication by 11
- Two digit square of numbers ending with 5 (or multiplication numbers with first digits adding up to 10)
- Finding number complements (distance of number from nearest "simple number", for example distance of 87 from 100 is 13)
- Addition and subtraction (up to 3 digits by default)
- More problem types
- Progress evaluation and histograms
- Feedback and explanations of problem solutions
- Worksheet generation
- Difficulty scaling (determined by current skill level)