Quantitative Aptitude - Arithmetic Ability Questions

If sec2A cosec2A = x, then x is

For triangle ABC, find equation of median AD if co­ordinates of points A, B and C are (2,­4), (3,0) and (5,­2) respectively?

If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?

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

The point R(a,b) is first reflected in origin to R1 and R1 is reflected in x-axis to (-3,4). The co-ordinates of point R are

Instead of multiplying by 25, a student multiplies that number by 52 and gets 324 more than correct answer. Then that number is

A circle and a square have same area. The ratio of the side of the square to the radius of the circle will be:

A train of length, 245 metres, takes 20 seconds to cross a 355 metres long bridge. How much time (in seconds) will the train take to cross a 390 metres long platform?