Numbertopia

Numbertopia is a variation for the classic math game "24 Game".
In the "24 Game", players manipulate 4 playing cards to achieve a result of 24 by using addition, subtraction, multiplication and division. In Numbertopia, players have to manipulate 4 or 5 cards to achieve a random number. It requires more complicated strategies and advanced arithmetic skills.
There are 2 kinds of puzzles in Numbertopia: the Level Puzzles and the Random Puzzles. The Level Puzzles contain 100 stored puzzles. At the start, most levels are locked, and players solve the puzzle from level 1 to gain yellow stars. By gaining more yellow stars, more levels can be unlocked. The Random Puzzles are generated by computer at real time. There can be more than one solutions for each puzzle, and players will gain a red star if find any solution without viewing the answer.
Enjoy your challenge!