Krypto is a mathematical game used to promote proficiency in basic arithmetic operations.
Each player is dealt a five card hand, a final card is placed face up on the table as objective numbers. Using only basic arithmetic (addition, subtraction, multiple and division) the player must use each card exactly once to reach the objective number.
Krypto contains 56 cards: three cards for numbers 1-6, four for numbers 7-10, two for 11-17, and one of each number 18-25. This allows almost all hands dealt to have at least one valid solution.
The Android app allows someone to practice and enjoy playing Krypto. The app comes with a solver for difficult hands, or if you want to see all possible solution to a problem.