Tips for solving a numerical sum in math.....
1. Read the question carefully.
2. Bring out the information given and write it in short.
3. Calculate the amount of the quantity asked in the question carefully step by step using required formula.
4. Any calculation done in the rough work area must be written in the fair area very very carefully. No mistakes are allowed.
5. Review the process carefully and write the answer neatly. Don't ignore writing the answer at the end.
Above all ... Don't hurry up while solving. Step jumps & overconfidence may cause silly mistakes.