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)
Jeevesh magnani
https://youtu.be/qe1MtcDUvzU the above link gives you a brief example and attached will give you an introduction to it. please have a look