### A good answer might be:

32 bits.

# Hex Addition

Here is a problem with 4 bits:

    1111
     0111
     1001
     ----
     0000
    Overflow was detected.

Two four-bit numbers are added, but the sum does not fit in four bits. If we were using five bits the sum would be 1 0000. But with four bits there is no room for the significant "1". Because the carry out from the most significant column of the sum (the left column) is "1", the 4-bit result is not valid.

The electronic circuits of a computer can easily detect overflow by checking if the carry-out of the leftmost column is a zero or a one. A program might branch to an error handling routine when overflow is detected.

### QUESTION 6:

Add these numbers, represented in eight bits:

>     0010 1100
>     0101 0101
>     ---------