Sudoku is a logic based placement puzzle. The rule of this puzzle is to fill each square with a number from 1 to 4, 1 to 6 or 1 to 9, depending on the type of Sudoku 4 by 4, 6 by 6 or 9 by 9. Each number can only appear once in the same row, column and also in the grid. It starts with 4 by 4 grid, i.e. use of 1 to 4 numbers. It helps students to understand the concept of the game. Once they are comfortable with the 4 by 4 grid game, they move to 6 by 6 grid. Here they play with numbers from 1 to 6. Firstly, they work in groups and then individually. After working individually for 20 to 25 minutes, all club members discuss their answers as to which number will come in the particular square and why. All of them enjoy this interactive session very much. Slowly, they proceed towards the 9 by 9 grid. Now, they place numbers from 1 to 9 which is a challenging task for them. Here students practice and perform the 9 by 9 grid easily. Sudoku Club helps them to think critically, accurately and logically. It also helps in promoting team work. Sudoku activities help students to think in a smart way.