Quantitative Aptitude - Arithmetic Ability Questions

If 2+x+2-x2+x-2-x=2,then the value of X is

If the diameter of a sphere is 14 cm, then what is the surface area (in sq.cm) of the sphere?

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?

Convert decimal number 101 to binary.

In the given fig, ST||RP, then what is the value of supplementary angle y (in deg)?

A solid sphere of radius 9 cm is melted to form a sphere of radius 6 cm and a right circular cylinder of same radius. The height of the cylinder so formed is

A right circular cylinder is partially filled with water. Two iron spherical balls are completely immersed in the water so that the height of the water in the cylinder rises by 4 cm. If the radius of one ball is half of the other and the diameter of the cylinder is 18 cm, then the radii of the spherical balls are

Neeraj's earning was decreased by 60% and after that subsequently increased by 60%. Find the final loss % on his earnings?