Base-10 (also called decimal) number system uses ten symbols to code information. Most commonly, these symbols are, 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.
Base-5 (also called quinary) number system uses five symbols to code information. Most commonly, these symbols are, 0, 1, 2, 3 and 4.