See I won't say it as the toughest exam or even a tough exam.. Because with the ongoing increasing competitive world, every entrance exam has high standards and becomes tough due to competition basically. But yes if you stay dedicated and focused well enough, things are doable Ofcourse.  I firmly believe that anyone who knows his basics well won’t really have much trouble getting through. The questions on the entrance exam are not easy, but are quite doable. Moreover, contrary to popular belief, the coursework for undergraduate mathematics by any institution is sufficient in terms of mathematical knowledge required. As I said, the questions really test your understanding of the basics, rather than the extent of your knowledge.

Thank you.