Black Math - Challenge 140 puzzles 2.1.8

140 thought-training levels can be trained in any spare time – wait in line, in restroom, or even insomnia, each level is enough to challenge your intuition and cognition.

Game features:

- Nine-segment
- No ads
- Elegant interface
- A lot of difficult levels
- multi-language

If you have any questions, please send them to `math@deeplusplus.com`