Number Line Worksheets - Math-Drills Custom number line sequences. The common differences were customized on the following worksheets based on a user request. The possible common differences are: 2, -2, 5, -5, 20, -20, 25, -25, 100 or -100. Increasing Number Line Sequences (Custom 1000 to 10000) Decreasing Number Line Sequences (Custom 1000 to 10000) Increasing & Decreasing Number ...