Hello Satendra, Greetings!

You can follow following steps to increase your maths speed in JEE Mains:

1. Practice different type of problems and you will know which approach to solve a math problem in minimum time.

2. While solving questions of a particular chapter – say, indefinite integration – write down all the formulae of that chapter on a sheet of paper and keep it with you.

3. If you are stuck on a problem, leave it for later. Don’t let the problem affect your state of mind. Leave that particular sum, go on the next one.

4. When you are solving sums, always start with the easy ones and then go over to the difficult ones. This will help you memorize the concepts and strength your basics.

5. DON’T USE A CALCULATOR. Strictly avoid calculators. Initially, you will face problems, but this will help you drastically at later stages.

Thank you, hope this helps.