Madhur's present salary is ₹ 3500. It will increase by 10% next year. What will be Madhur's salary after the increment?

### Concept & Formula This is a direct percentage increase problem. To find the new value after a percentage increase, calculate the increase amount and add it to the original base value, or simply multiply the original value by $(100 + \text{Increase})\%$. ### Step-by-Step Solution * **Given**: Present salary = ₹ $3500$. Increment = $10\%$. * **Calculation**: 1. Calculate the increment amount. $$10\% \text{ of } 3500 = \frac{10}{100} \times 3500$$ $$= 350$$ 2. Add the increment to the present salary to find the new salary. $$\text{New Salary} = 3500 + 350$$ $$\text{New Salary} = 3850$$ ### Exam Strategy & Shortcut Finding $10\%$ of any number ending in zero is as simple as dropping the last zero (or moving the decimal point one place to the left). $10\%$ of $3500$ is instantly recognizable as $350$. Add $350$ to $3500$ mentally: $3500 + 300 = 3800$, plus $50 = 3850$. This should take no more than 3 seconds. ### Common Pitfall Some students calculate the $10\%$ increment ($350$) and mistakenly select that as their final answer if it were an option, forgetting to add it back to the original principal to find the *final* salary. Always re-read what the question is asking for (increment amount vs. final salary). ### Final Answer **Therefore, the correct answer is ₹ 3850.**