Find 24 Points

A game challenges your brain. Simply speaking, for arbitrary 4 cards from a poker except Jokers, players is required to count 24 points upon these 4 cards only through plus(+), minus(-), multiplication(x) and division(/), where A=1, J=11, Q=12, K=13. For example, given 4 cards: 7, Q, K and 7, in that case, there may be a few solutions, e.g. (7x7)-(13+12) is such one.

1. Touch any two cards and one of arithmetic signs to compute points (no matter what touching order). The result derives a new card called a composite card.
2. Long click on a composite card to undo.
3. Swipe on the board to new a game.
4. Press help option menu to get this help back.
5. Press the key button to get the solution hints, but not recommended.