You need not worry about the registration number. You can find the forgotten registration number by following the mentioned below steps:

• First of all visit the official website of the Navodaya
• Now search the page download the admit card
• There will be option namely 'find your registration number'
• Now there will be a new display in which you have to enter your personal details.
• After completing your details you need to click on search registration number
• On the basis of registration number you can find your admit card and download it

Read more:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://school.careers360.com/exams/jnvst/all-questions&ved=2ahUKEwjhi6DfqYP3AhU_zDgGHQFBDBgQFnoECAwQAQ&usg=AOvVaw0A_b1iHagy60xd6xYX6-vY