Numbers Binary: Base 2 | 0 & 1 | 101012 Decimal: Base 10 | 0 to 9 | 2910 Octal: Base 8 | 0 to 7 | 125708 Hexadecimal: Base 16 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F | 19FDE16 Binary To Decimal Decimal To Binary