Quantitative Aptitude - Arithmetic Ability Questions

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

A box of 20 items was bought for Rs. 6,400 after a discount of 20%. Find the cost of each item.

The angle of elevation of the top of a tower from two horizontal points (in opposite sides) at distances of 25 meter and 64 meter from the base of tower are x and 90° - x respectively . The height of the tower will be

What is the value of [(sin x + sin y) (sin x – sin y)]/[(cosx + cosy) (cosy – cosx)]?

If cosec π/4 - ­ sin π/3 = x, then the value of x is

Find the value of 'y' if y84 = 225

In ΔPQR, S and T are points on side PQ and PR respectively. ST is parallel to QR. If S divides PQ in the ratio 4:1 and length of QR is 15 cm,what is the length of ST?

What is the equation of the line whose y­-intercept is ­3/4 and making an angle of 45° with the positive x-­axis?