Quantitative Aptitude - Arithmetic Ability Questions

Two pipes fill a tank when working individually in 25 and 40 hours, respectively while a third pipe can drain the filled tank in 16 hours. If all the three pipes are turned on at the same time when the tank is empty, how long will it take to fill the tank completely ?

The average of three numbers is 6. The average of the first two is 5 while the average of the last two is 8. The three numbers are:

In triangle ABC, O is the orthocenter and angle BOC is 120 deg. Calculate angle BAC.

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

If tanA = x, then x is

In a college, 25% of male faculties are same in number as 1/3rd of the female faculties. What is the ratio of male faculty to female faculty in that college?

Two trees are standing along the opposite sides of a road. Distance between the two trees is 400 metres. There is a point on the road between the trees. The angle of depressions of the point from the top of the trees are 45 deg and 60 deg. If the height of the tree which makes 45 deg angle is 200 metres, then what will be the height (in metres) of the other tree?

The number of sides of a regular polygon whose exterior angles are each 40 deg is