## A Lesson in Irrational Numbers & Surds

A number that is not rational is irrational. So, what are rational numbers, in the first place? Well, a number is called a rational number, if it can be written in the form \( \frac{p}{q} \), where \(p\) and \(q\) are integers and \( q \neq 0 \). So, a number which cannot be expressed …