Mohan bought 25 books for Rs. 2,000 and sold them at a profit equal to the selling price of 5 books. The selling price of 1 book is: 

A book seller sells a book at a profit of 10 %. If he had bought it at 4 % less and sold it for Rs. 6 more. he would have gained $$18{3\over4}\%$$. The cost price of the book is 

Krishna bought a camera and paid 20 % less than its original price. He sold it at 40 % profit on the price he had paid. The percentage of profit earned by Krishna on the original price was 

A merchant fixes the sale price of his goods at 15 % above the cost price. He sells his goods at 12 % less than the fixed price. His percentage of profit is: 

The cost price of two dozen bananas is Rs. 32 After selling 18 bananas at the rate Rs. 12 per dozen, the shopkeeper reduced to rate as Rs. 4 per dozen. The percent loss is 

If  $$\sqrt{2}=1.414$$, the value of $${ \sqrt{2}-1\over\sqrt{2}+1}$$  is nearest to 

The value of   $${(75.8)^2-(55.8)^2\over20}$$

If one shirt is offered on the purchase of 4 shirts. Find the net discount.