One of the most common and interesting puzzles are crossword and Sudoku, which can be played by both adults and kids. In beginning you can feel a little bit complicated to solve them but as you get the answer of one or two riddles then naturally you will start taking interest in it. There are some activities such as Free online IQ test, puzzles, quizzes are there that assist you to do so. All these things help us to make our mind more focused and thinkable. There is an old age adage i.e. �...