Ramesh purchased a bicycle for $Rs. 5200$ and spent $Rs. 800$ on its repairs. He had to sell it for $Rs. 5500$. Find out his profit or loss percent.

The marked price of a bed is $Rs. 2400$. The shopkeeper gives successive discounts of $10 \%$ and $X \%$ to the customer. If the customer pays $Rs. 1836$ for the bed,then find the value of $X$ in $\%$.

$A$ person bought an article for $Rs. 240$. For how much should he sell it so as to lose $20\%$?

$A$ man bought nine pens for a rupee. How many pens should he sell for a rupee to gain $50 \%$?

Anil started a business with an investment of $Rs. 25,000$. After $3$ months,Vishal joined his business with a capital of $Rs. 30,000$. At the end of the year,they made a profit of $Rs. 19,000$. What will be Anil's share in the profit? (in $Rs.$)

$A$ discount series of $10 \%$,$20 \%$,and $40 \%$ is equal to a single discount of.......$\%$