Expand and simplify (x + 4)2 + (x -­ 2)2

If the radius of a circle is increased by 16%, its area increases by

Marked price of an item is Rs 200. On purchase of 1 item discount is 5%, on purchase of 2 items discount is 14%. Rajeshri buys 3 items, what is the effective discount? 

What is the value of (3/5 + 7/9)?

A rice trader buys 8 quintals of rice for Rs 3,600. 10% rice is lost in transportation. At what rate should he sell to earn 15% profit?

An angle is greater than its complementary angle by 30°. Find the measure of the angle?

To cover a distance of 225 km in 2.5 hours what should be the average speed of the car in meters/second?

If sec 300° = x, then value of x is