Dear Aspirant,

As from last year Jee main is conducted by Nta last year there were 2 papers held in one year In January and april .So you must solve all those paper to go through the difficulty level of paper set by Nta .You can also solve last year question papers from 2013 so you  can acheive a good score in Jee mains .Solving the previous year question paper will give you extra benefit at time of jee mains .So you should analyse all the past year question papers and try to crack all the past year problems

Thanks

All the very best