If an item is sold for $Rs. 924$,there is a profit of $10\%$. What is the cost price?

$A$ person sold a radio at a loss of $5 \%$. Had he sold it for $Rs. 210$ more,he would have gained $25 \%$. For what value should he sell it in order to gain $35 \%?$

An article which is marked at $Rs. 975$ is sold for $Rs. 897$. The percentage discount is?

The selling price of a glass is $Rs. 1965$ and the loss percentage is $25 \%$. If the selling price is $Rs. 3013$,then what will be the profit percentage (in $\%$)?

An item costing $Rs. 200$ is being sold at $10 \%$ loss. If the price is further reduced by $5 \%$,the selling price will be (in $Rs.$)

$A$ trader marked his goods at $20 \%$ above the cost price. He sold half the stock at the marked price,one quarter at a discount of $20 \%$ on the marked price,and the rest at a discount of $40 \%$ on the marked price. What is his total gain percentage?