Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ravi prakash yadav
Usually in these types of exam they don't ask such sums but u should at least know how to do such problems because there are some tricky and crucial steps which are required in these exams. Also each year they ask few questions which takes lot of time and effort and you must solve them after solving easy ones. Theses type of sums falls in that category of questions. Usually they don't ask such sums directly but who knows what coming next. So just see some solved examples and at least know the method to proceed and always opt such questions after solving easy ones in exam.