Find and tap identical pairs on the number grid (1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-9) or two numbers that add up to 10 (1-9, 2-8, 3-7, 4-6, 5-5). You can click to match the number pairs in the horizontal, vertical, and diagonal directions, or you can click to match the number pairs at the end of the right end of one line and the beginning of the left end of the following line. More numbers can be added at the bottom if no extra actions exist.