Quantitative Aptitude - Arithmetic Ability Questions

A tank can be filled in 30 minutes. There is a leakage which can empty the tank in 90 minutes. Therefore, the tank will be filled in

Pipe A can empty a filled tank in 28 hours while Pipe B can fill the same tank, when empty in 35 hrs. If alternatively Pipes A and B are turned on for an hour each time, starting when the tank is full, how long will it take to empty the tank?

A shopkeeper marks the price of an article at Rs. 320. Find the cost price if after allowing a discount of 10%, he still gains 20% on the cost price.

If PQ and PR be the two tangents to a circle with centre O such that ∠QPR = 120° then ∠POQ is

Select the odd word/letters/number/number pair from the given alternatives.

In the following question, select the odd word from the given alternatives.

2sin[(C+D)/2].sin[(D­-C)/2] is equal to

If y = √3 - √2, then find the value of 1y3 - y3.