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)
Alka gupta
because it is a cyclic arrangement.....when we change it two times we get those numbers....z x y , y z x , but in next cycle we get same number x y z....