But you are not required to take the 3- 1 and 4-4 college entrance examinations. Science students are only qualified to enter universities of science and engineering and economics to study mathematics after completing elective courses 2- 1, 2-2, 2-3, 3- 1, 4-4, 4-5. Elective courses 3- 1, 4-4, 4-5 do not need the college entrance examination.