Hello dear

Solving last ten years papers can be done in two ways first is that you read all the answers and it is done  and second is you are ready for exam and than you solve those papers for practice.

In first case it is not sufficient because actually you are just cramming those answers and when the actual value in question becomes different than you will get confuse and get in trouble. So it is not enough or this case will not helpful as how many questions you can cram .

In second case you refrain your concepts through the actual exam conditions and analyse yourself that what you know about the subject . And this is the best method and it will be sufficient to solve last 10 years exam in this case .

Hope you understand this thing .

Good luck

Hey Mannik,

Hope you are doing well!

Well dear solving the previous years papers is really very helpful as the types of questions in CBSE board exams keep on repeating,It will be an advantage for you for chemistry and maths ,but,physics papers come usually tough so you need more and more practise for it.

Also,don't rely upon just the 10 years papers,use it as a finishing touch for your prepartation,that will more helpful for you.

Hope this was helpful!

All the best!

Keep Smiling :)