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15拼圖 - 最强数独九宫格，数学少年宫螢幕截圖

iPhone

About 15拼圖 - 最强数独九宫格，数学少年宫

Exercise your brain with 15 Puzzle - classic number game

How to play

The basic form is of a 4 by 4 grid. There are 15 tiles numbered 1 to 15 and the 16th place is empty. Before play begins the tiles are randomly scrambled by sliding to any starting position. The object of the game is then to unscramble the tiles to get them into consecutive order, with the space in the bottom right again

Sounds easy? Challenge yourself and set your time record!