Hi Aspirant,

To excel in something you need to practise for a long span of time consistently.Still you can crack KVPY with two months of strategy but you have to work real hard and you need to have a basic understanding over all subjects.SB Stream is a bit tough since it contains all students of 1st year undergraduate students and the question is bit tough seeing the maturity level and all.So yes you need to study hard if you need to carck KVPY.

Hope it helps!!