how i can crack iitjee and aieee in 15 months, i am currently on class 11 and half yearly exams are gone so only 15 months are left

If you had been scoring 70% and above in all exams and if you can study for at least 5 hours a day, 6 days in a week, after your school, then you can successfully attempt both the exams to gain admission in IITs or NITs. Immidiately after your 11th exams, join any reputed coaching center for a year