hi,please answer my question soon,as i'm giving 12th in 2013 and i hv 76.06% and i'm notin top 20 percentile,so i want to give improvement exam in maths so i want to know that m i eligible for jee mains 2014/advanced if i give improvement in only one subject or i hv to give improvement in full five subjects,WHAT I HAVE TO DO?,also i got 55 in mathematics this year if i got above 80 in next year THEN all the marks i got in 2013 boards are added TO THE 2014 IMPROVEMENT EXAM I GIVE IN 2014 or it remains the same as in 2013 i.e 76.06 or it will incrEASE???