The math problems are always seems not easy to figure out. As we get the question, how can we unlock it quickly? The thing is, we don’t have any equations on the paper, so we need to recite functions and some basics ideas for unlocking some simple questions (i.e. Some tests, some principles, some theory…) You may need to try to use more than 2 ways in order to figure the question, that will be very helpful when the only way was broken in the exam, you can use the other way to solve the problem if you want.

Just a reminder, you can always do some exercises with your friends before the exam, remember, two hands are always better than one.