Like many other fields, mathematics has terms that sometimes confuse or overlap. For example, it is interesting to note that there *is* such a number as 0/0, which is called an *indeterminate* number. But be careful: This is not the same as an undefined number. If an indeterminate number comes up somewhere, you never know the value for your specific case—and you can conceivably give it any number of values. Confusing? Don’t worry, you’re not alone. It is one of those quandaries that often baffles the best mathematicians.