hi,

jnu pg entrance test will be an mcq tyoe entrance test, duration will be 4 hours,

JNU paper for M.Sc. entrance paper has two parts.

The first part has questions from Science and Mathematics  (based on 10+2)

Second part of JNU paper for MSc. courses carries questions from Physics, Botany, Geology, Zoology, Chemistry and Mathematics of B.Sc. level.

so you need to study throughly you ug courses questions related with your msc streams,

some of the books you should follow,

A Complete Resource Manual M.Sc Mathematics Entrance examination by suraj singh , rashmi gupta

IIT JAM (Joint Admission Test for M.Sc.) 2020 - Mathematics by gkp publications.