Quantitative Aptitude - Arithmetic Ability Questions

If (secA - tanA)2 = x, then the value of x is

Find equation of the perpendicular bisector of segment joining the points (2,-5) and (0,7)?

What number, from the following should be deducted from 1184 to make it exactly divisible by 21?

For triangle ABC, what would be the equation of median AD if co-ordinates of A, B and C are (-5,4), (-4,0) and (-2,2) respectively?

X and Y are two alloys which are prepared by mixing zinc and aluminium in the ratio of 1 : 4 and 11 : 8 respectively. If equal quantities of alloys are melted to form a third alloy Z then what is the ratio of zinc and aluminium in alloy Z?

The mean of the data 1, 1/2, 1/2, 3/4, 1/4, 2, 1/2, 1/4, 3/4 is

A boy crosses a 300 metres wide road in 30 seconds. What is his speed (in km/hr)?

Pipes A, B, and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hours, respectively, the third can drain the cistern, when filled, in 6 hours. If all the three pipes are opened simultaneously when the cistern is three-fifth full, how many hours will be needed to fill the cistern?