What's the age criteria for class 9th student

There is no single age applicable to every Class 9 admission because the requirement can vary depending on the school, education board and admission rules.

Generally, a student entering Class 9 is around 13–15 years old, but the exact cut-off date and permitted age range should be checked with the particular school.

If you are asking about Jawahar Navodaya Vidyalaya (JNV) Class 9 admission, the age requirement is specifically mentioned in the official admission notification and should be followed according to the relevant academic year.