A tradesman gives $4 \%$ discount on the marked price and gives $1$ book free for buying every $15$ books and thus gains $35 \% .$ The marked price is increased above the cost price by (appx.) (in $\%$)

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 have made a profit of $Rs.\, 19,000$ what will be Anil's share in the profit? (in $Rs.$)

Sanjay purchased a chair marked at $Rs.\, 800$ at $2$ successive discount of $10 \%$ and $15 \%$ respectively. He spent $Rs.\, 28$ on transportation and sold the chair for $Rs.$ $800 .$ How much is his gain percentage?

Divyam bougth an article with $15 \%$ discount on the labelled price. He sold the article with $10 \%$ profit on the labelled price. What was his percent profit on the price he bought?

A shopkeeper fixes the marked price of an item $35 \%$ above its cost price. The percentage of discount allowed to gain $8 \%$ is......$\%$

The cash difference between the selling price of an article at a profit of $4 \%$ and $6 \%$ is $Rs.$ $3 .$ The ratio of the $2$ selling price is?