For any two real numbers a and b.

a-b2+b-a2 is

If the cost price of 20 books is the same as selling price of 25 books, then the loss percentage is

The railway fares of air conditioned sleeper and ordinary sleeper class are in the ratio 4:1. The number of passengers travelled by air conditioned sleeper and ordinary sleeper classes were in the ratio 3:25. If the total collection was Rs. 37,000, how much did air conditioner sleeper passengers pay?

While selling a shirt, a shopkeeper gives a discount of 7%. If he gives discount of 9% he earns Rs. 15 less on profit. The market price of the shirt is :­

A hollow hemispherical bowl is made of silver with its outer radius 8 cm and inner radius 4 cm respectively. The bowl is melted to form a solid right circular cone of radius 8 cm. The height of the cone formed is

Koushik can do a piece of work in X days and Krishnu can do the same work in Y days. If they work together, then they can do the work in

If a - b = -5 and a2+b2=73, then find ab.

Which of the following is correct?

The diagonal of a square is 10√2 cm, find its perimeter?