Can we start preparing for entrance exam from class 12

I often say that 8 months of die hard preparation is enough to crack IIT but obviously you are far behind your classmates .  So you will have to double your efforts. No parties no fooling around No facebook no nothing but studies and you may just be able to crack JEE

Best of luck

Ya its now u shud do it.....Better put more of your concentration rather than on other things.....