Controls: Mouse LMB - select numbers RMB - note undesired number (may be needed for high-complexity, not generally necessary) RMB outside the field with numbers - deselect all properties Description: Located on the playing field is a number. Given formula is of the equation "A + B = number" (except for the addition modes, " subtraction," " multiplication" and " division"). A and B are unknown, and they are located somewhere on the field in neighboring cells. We need to find these two numbers. Find the number and earn points, the amount depending on how quickly the numbers were found. One game at a time. With proper selection of the pairs remaining time increases, but get it wrong and time will be deducted. The game mode is selected using three parameters: Complexity - the maximum number of influences on the field: Easy - numbers from 1 to 9; Normal - from 1 to 49; Hardcore - from 1 to 99 Field Size - Small - 5x5 field; Normal - Field 9h7 Mode - choice of mathematical functions: addition, subtraction, multiplication or division The time that is given at the start calculated depending on the selected parameters. Bonus time, which is given for correct answers, is calculated from the average time the player uses to get the right answer.