Quantitative Aptitude - Arithmetic Ability Questions

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

√[(1 ­ sinA)/(1 + sinA)] is equal to?

If cos 2π/3c = x, then the value of x is

What is the value of tan150°?

The areas of two similar triangles ΔXYZ and ΔPQR are 100 sq cms and 25 sq cms respectively. If PQ = 4 cm then what is the length of XY (in cm)?

The line passing through (­3,4) and (0,3) is perpendicular to the line passing through (5,7) and (4,x). What is the value of x?

A ladder 20 m long is leaning against a vertical wall. It makes an angle of 30 deg with the ground. How high on the wall does the ladder reach?

The radius of a sphere is 6 cm. It is melted and drawn into a wire of radius 0.2 cm. The length of the wire is