# CSCI 255 Homework 1

This assignment is due in class
or to my office assistant in RH 215 by 1:45 pm on 26 August.

## Problem 0

If we were able to change the lecture time to Wednesday-Friday from
1:10 to 2:35, would you be able to attend at that time?

What about Monday-Friday 1:45 to 3:00?

## Problem 1

Convert the following unsigned binary numbers into decimal numbers.

- 10101111
- 10000101
- 10101000

## Problem 2

Convert the following decimal numbers into binary numbers.

- 10
- 255
- 2000

## Problem 3

Convert the following signed decimal numbers into 10-bit twos-complement representation.

- -1
- 255
- 0
- -13

## Problem 4

Convert the following 7-bit twos-complement numbers into signed decimal numbers.

- 0000000
- 0101010
- 1010101
- 0011000
- 1110000
- 1101010

## Problem 5

For numbers are stored in 10-bit words,

- what is the smallest unsigned number that can be stored?
- what is the largest unsigned number that can be stored?
- what is the smallest twos-complement number that can be stored?
- what is the largest twos-complement number that can be stored?