Quantitative Aptitude - Arithmetic Ability Questions

If √(1 + cot2A)/cotA = x, then the value of x is

2*[­0.3(1.3 + 3.7)] of 0.8 = ?

If a merchant offers a discount of 25% on the list price, then he makes a loss of 5%. What % profit or % loss will he make if he sells at a discount of 10% of the list price?

What is the average of all natural numbers from 21 to 39?

From the circumcentre I of the triangle ABC, perpendicular ID is drawn on BC. If ∠BAC = 60°, then the value of ∠BID is

To cover a distance of 333 km in 2 hours by a car, what should be the average speed of the car (in meter/second)?

12 men complete a work in 9 days. After they have worked for 6 days, 6 more men join them. How many days will they take to complete the remaining work?

The radius of a sphere and hemisphere are same. The ratio of their total surface area is