1. base 2, 4, 8, and 16 numbers translate more naturally to the numbers stored in the computer.
3. Both of these are coding schemes designed to increase immunity to noise. A parity bit can be used to check for a changed bit in a byte. Gray code can be used to check for a value error in a stream of continuous values.
4. a) 1101 0100 0011 0001, b) 3117
15. a) 3532 = 0011 0101 0011 0010 = DCC, b0 the number is not a valid BCD
18. a) 9651, 2438, 4351, b) 0010 0101 1011 0011, 0000 1001 1000 0110, 0001 0000 1111 1111, c) 16440, d) 1, 0, 0
19. The binary value is 1111 0100 1001, so the second bit is 0
20. when selecting the sequence of bit changes for Karnaugh maps, only one bit is changed at a time. This is the same method used for grey code number sequences. By using the code the bits in the map are naturally grouped.
