RIGHTLY saidExams do not test a person's Mental ability and knowledge because they just test whether a person is good in those mere 3 hours......
The expression 0/0 is an "indeterminate form". That does not simply mean that it is undefined; rather, it means that the limit of f(x)/g(x) is determined by the particular functions f and g as they both approach 0. As x approaches some number, the limit may approach any finite number, 0, ∞, or −∞, depending on the specific behavior of the functions. See l'Hôpital's rule.