I am from state board..How can I prepare physics numerical?*

To solve Physics Numericals You must be good at Basic Mathematics and conceptually You must be sound. If You are both then You can start solving Numerical first read them and think what You understand from it, If You are able to understand the Problem then Only Proceed but if you think that you re unable to understand that You can take help of some solved Problemas But remember that doesn't make it a habit. You can take help of Books such as Concept of Physics which not only help You to understand the concept but also Have a good collection of Problems, You should find a book which has the simpler language to understand for you then read from that, Even You can take help of Some videos To understand the concept.