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)
Komal bhati
you can get previous years questions papers solutions in english..for video you can search in viedo option.. hope it will beneficial for you..