There are few interesting mind training games for you.
Tricky Cups
Games Description
In this game there will be a number of cups and hiding a few coins, you need to remember where the coins are and then the cups will start to move, after that pick out the cups that bear coins. When the cups move, watch carefully because they may do trick moves, in which only the positions of the cups are exchanged, but the positions of the coins are not. There are a number of levels in this game and the game will be harder and harder.
SuDoKu
What you need to know about sudoku: Sudoku is a game of logic, based on a grid of 9 columns and 9 rows. This is sub-divided into nine 3 x 3 squares. A completed Sudoku puzzle comprises this grid completely filled with the numbers 1 - 9 appearing exactly once in each row, column and square. You can see an example grid to the right. Another thing about sudoku - as you go through solving it, you will need pencilmarks to keep track of what goes where, these are shown by the small numbers to the right.
Each Sudoku puzzle, or at least each valid puzzle, has one unique solution.
The difficulty varies depending on how many numbers you are given to start with - the more numbers usually the easier the puzzle. Puzzles also tend to be symmetrical. Another thing about sudoku - you should be able to use logic to solve each puzzle and never need to make a guess and hope for the best! This is achieved by implementing 'human solve algorithms' in the puzzle generators (or making them by hand). From the starting grid, you should be able to deduce the number that must go in every square of the grid, number by number. You should not have to guess at any values if the grid has been correctly generated. There are a number of simple strategies that you can use to help you solve the Sudoku grid. So that's all you need to know about sudoku, now it is time to start playing! Lest Play Now

Games Description This is a crossword puzzle game in which you need to fill in all the blocks with characters. Position the mouse cursor over a block to see the related hints, and the press the mouse button to begin entering the word, use the keyboard to type in the word. Press the check answer button when finished. Beware, if you get a block wrong, marks will be deducted.