## CS 1401, Quiz #1

**Date:** Tuesday, January 24, 2006

**Class section** (9 am or 10:30 am): ______________________

**Name:**
______________________________________________________________________

1. Explain why the invention of 0 made computations easier.
(*Hint:* how were numbers represented before that? was it easy to
add or subtract these numbers?). Who was the first to invent 0?

2. Describe, step by step, an algorithm that, given three
real numbers *a*, *b*, and *c*,
returns the values *x* for which *a*x-b=c*.