The value of a mobile phone depreciates at the rate of 10% every year. It was purchased 3 years ago. If its present value is Rs. 6561/-, its purchase price was.

Profit obtained on selling an article for Rs 540 is equal to the loss incurred on selling the article for Rs 370. if selling price is Rs. 910, Then what is the profit percentage? 

Which one of the following costs more?

I. 200 packets of ₹ 250 each

II . 20 dozens of ₹ 250 each

The cost price of item B is Rs. 150/- more than the cost price of item A. Item A was sold at a profit of 10% and item B was sold at a loss of 20%. If the respective ratio of selling prices of items A and B is 11 : 12, what is the cost price of item B?

If the ratio of cost price and selling price is 5 : 4, then the loss percentage is-

A cow was sold at 8% profit. If it were bought at 20% less and sold at 40% profit, then the owner would gain ₹ 640 more. Find the initial cost price of the cow.

A vacuum cleaner was marked at 30% above the cost price and a discount of 24% was given on its marked price. What is the profit/loss percentage?