The difference between the selling prices of some articles if sold for Rs.12 per article instead of Rs.9 per article is Rs.150. If the sold price of these articles is Rs.250 then find the selling price of 21 articles if profit earned is 20%.

If a shopkeeper increases the selling price of an article by 10% and gets a profit of 37.5% on its cost price. If he increases the selling price by 25% above on old selling price then he gets a profit of ₹ 225 on his cost price. Find the cost price of the article?

A radio is sold for Rs.900 at 10% profit. If it had been sold for Rs 890, what would have been the actual profit or loss?

A men sells his cycle at 6% profit. Had he sold it at 15% profit, he would have received 180 Rs. More. What is the cost price of the cycle?

An article is sold for Rs 4,777 after giving a discount of 15%. What is the marked price of the article?

The cost of a new scooter is Rs 25000, at the end of each year its value becomes 80% of the starting price of that year, what will be the cost of the scooter after 3 years?

A merchant loses 10% by selling an article. If the cost price of the article is ₹ 15, then the selling price of the article is 

An item costing Rs. 840 was sold by a shopkeeper at a gain of 10 % and it was again sold by the new buyer at a loss of 5 %. Find selling price of the item is: