4x Puzzle. Numbers have never been more fun! Train your brain with 4x Puzzle and try to earn as many points as possible! This logical puzzle is easy to learn, but hard to master. Your task is to add number blocks to the field which are multiples of 1, 2 or 4 depending on the difficulty you select. If two adjacent blocks have the same value, they will be removed. You can combine blocks: drag them from the tray and drop them on top of another block. Their values will be summed up. Be careful though, the total value of a block can never be more than 100. Can you achieve a high score?