Question: how many different combinations can be made from a n bit value?
Answer: A 2-bit system uses combinations of numbers up to two place values (11). There are four options: 00, 01, 10 and 11. A 1-bit image can have 2 colours, a 4-bit image can have 16, an 8-bit image can have 256, and a 16-bit image can have 65,536.