SQR 4 is a colourful mathematical puzzle. The player's point is to make each line's digit sum equal to appropriate column's sum using addition (+), substraction (-), multiplication (?), division (?), squaring (^), square root extraction operation (?), concatenation (?) and clipping (?) only. Concatenation assigns the number after to the right of the number (13?6 = 136). The clipping removes the indicated number of digits from the number to the right (358?1 = 35).

- 6 levels of complexity (up to 7x7)
- a fascinating intellectual process to train your brains!
- 18 levels tutorial
- unlimited levels to play
- minimal price
- pleasant music
- UHD (4K) resolution support (3840x2160 pixels)

As soon as possible:
- trading cards

Develop mathematical thinking playing SQR 4!