Hi aspirant,

JEE Main is one of the most prestigious and hard-to-crack entrance examination in our country. Among all questions it asks, there are many questions which are to be skipped. These are put to decide the topmost ranks. So if you don't know those questions then it is better you leave them. Moreover, JEE Main is all about accuracy. Many students worsen their ranks by attempting those questions just by guessing and finally they end -up getting negative marks. Therefore, it is better you leave them but you can try if your are sure after eliminating options.

All the best.