Hey.

To perform well in NTSE, STAGE 1 you can follow the given tips-

You should follow your NCERT books as it will clear all your basics and a lot of part will de from there only.

You should also give importance to the MAT section which tests your mental ability. Work on your general knowledge too.

Make sure you solve a few mock tests, and previous years questions to get an idea of how to go about the test. Then analyse which part needs more attention from your side and focus on that.

Best of luck!