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)
Sajan sarthak
octahedron comes under normal class i.e highest symmetry element class in isometric system and that class is known as hexoctahedral class the HM symbol for this class is 4/m bar3 2/m. where as tetrahedron is 4 3 m