This is one of them:

Given two numbers (one positive and one negative) and using the least number of digits needed (I have to write this number for each conversion) I have to convert these numbers in:

- Absolute value base 2

- Absolute value base 16

- One's complement

-Two's complement

- Sixteen's complement

- BCD code

- Excess Notation where the polarization is 2^n-1 -1 (n stands for the least number of digits needed).

For example I have the following numbers -256 , 217, 754.

Thanks a lot for your time!