Neco mathematics exam is no different from other exams. It depends on how deeply you know Mathematics. Knowing basic mathematics alone is not enough to pass the exam. You must study hard and solve as many calculations as you can.

One thing with mathematics is that the more you solve it the more you understand.

Always do practice test. Yes, solving past Neco questions will help you visualize what the exam is likely to be like. It will help you know the important areas you should cover. It will also help you know how prepared you are for the exam. Besides, major examination bodies like JAMB, WAEC and Neco are now using past questions to set their exams. So use this and you will have an edge above the exam.

Learn with a simple calculator. When practising Neco mathematics questions, solve it with a simple calculator. This is because the calculator they will give in the hall is just a simple calculator that can solve only simple arithmetics. By studying with such calculator, you will familiarize yourself with it and also devise other methods you can use to solve calculations which the Calculator is unable to solve.

See Neco 2017 Exam Timetable. Click the link below to read it.
http://earboard.com/blog/neco-2017-examnation-timetable-download-original-pdf/