Hi Shivam,
To get admission in class 9th in Navodaya vidhyalaya one has to clear the jnvst exam or navodaya entrance exam for class 9th.
The paper will be of multiple choice questions type in which you have to tick the correct answers.
The exam consists of following subjects-
English 15 questions
Hindi 15 questions
Maths 35 questions
Science 35 questions
The syllabus for maths is as follows -
●number systems
●squares and square roots
●cubes and cube roots
●algebra
●probability
●exponent and powers
●mensuration
●direct and inverse fractions
●profit and loss
●data handling
So,to get good scores in maths do prepare for these topics properly.
For more information you can check the official website of navodaya vidhayalaya as well.
Good luck.
