Arihant Expert Team Solutions for Exercise 2: Numerical Aptitude

Average of $12$ numbers is $15$. If a number $41$ is also included, then what will be the average of these $13$ numbers?

By selling $96$ litre of milk, a person's gain is equals to the cost price of $24$ litre of milk. What is his gain percent?

A man sold $280$ chairs and had a gain equal to selling price of $35$ chairs. What is his profit percentage?

A man saves $64\%$ of his income in $8$ months. If he wants to save the same amount in $4$ months, then by how much percentage should he increase his monthly savings?

A man spends $65\%$ of his income and saves the rest. If his income increases by $25\%$ and spending increases by $20\%$, then what is the percentage change in his savings?

A train running with a speed of $18 \mathrm{km}/\mathrm{h}$, crosses an electric pole. If the length of the train is $540$ meters, then what is the time taken by the train to cross the pole?

A $100$ meters long train crosses a $800$ meters long bridge. If the speed of the train is $30 \mathrm{km}/\mathrm{h}$, then what is the time taken by the train to cross a bridge?

What is the sum of money which will become $₹ 201840$ at the rate of $16\%$ per annum at compound interest in two years?