Dear aspirant. To crack your entrance test go through  the NCERT books of psychology, Simply studying topics from mathematics and science will not help you a lot in your preparations.As far as topics of science and mathematics is concerned deeply study the biology books especially physiology of humans, Brain and it's function, Nervous system, go through different glands and their roles on human body.

Basic mathematics is very important in psychology as all the data study and evaluation is based on it. Theory of measurement is an important topic to cover. Statistics is also needed in psychology. You can go through central tendencies, Standard deviation, Quartile Deviation, chi square.etc. These are only few topics for better understanding please read NCERT Book (psychology) 11th and 12 standard.

Minimum cutoff for general category is 60.25. So go  ahead. All the best.