Number Sum - Math Puzzle Game is a fun and addictive puzzle game that will challenge your logic and math skills. With its simple yet challenging gameplay, this game is perfect for people of all ages. Playing sum number games and solving math problems can improve your arithmetic skills. If you are interested in number puzzles or math games for adults, and in training your additional skills, play this engaging number game for hours of fun! How to play - Use the toggle to switch between correct and delete modes.It will help you to mark the correct numbers and the extra numbers that you don't need. - Choose the correct numbers or remove the wrong number in order to make the rows and columns add up to the given sums. - Each level of these math puzzles has only one possible solution, so make sure that rows and columns work together at the same time. - Train your math skills with this free number puzzle with various levels of difficulty. Open different types of board from 3x3 to...