- Read the question carefully and understand what is being asked.
- Identify the given information, what needs to be calculated, and any specific conditions or assumptions mentioned.


- Revise the fundamental concepts and formulas related to the question.
- Ensure you have a clear understanding of the principles and theories involved.


- Break the problem down into smaller parts or steps if necessary.
- Identify any intermediate calculations or conversions required.


- List out the given data or known values.
- Assign variables or symbols to each quantity to keep track of them during calculations.


- Select the appropriate formula or equation based on the given information and what needs to be calculated.
- Substitute the known values into the formula and solve for the unknown.


- Pay attention to the units of measurement given in the question.
- Ensure all units are consistent throughout the calculations.
- Use dimensional analysis to check the correctness of the final answer.


- Solve a variety of numerical problems from previous years' papers and practice tests.
- Familiarize yourself with different types of numerical questions and their solution approaches.
- Develop speed and accuracy by regularly practicing calculations.


- Analyze any mistakes made during solving numerical questions.
- Identify the areas or concepts where you need improvement.
- Review the correct solutions and understand the steps taken to arrive at the answer.

Remember, practice and consistent revision of concepts are key to mastering numerical problem-solving in UPSC Chemistry Optional.