Quantitative Aptitude - Arithmetic Ability Questions

If A + B = 90 deg and Cos B = 1/3, then the value of Sin A is

If the standard deviation of a population is 7, what would be the population variance?

23 x 31 = 713. How much is 0.0713 / 3.1?

Three cubes of iron whose edges are 6cm, 8cm and 10cm respectively are melted and formed into a single cube. The edge of the new cube formed is

Find the total surface area (in cm2) of a cuboid of length, breadth and height of 10.5 cm, 8 cm and 9 cm respectively.

The least number that must be subtracted from 202 to make it a perfect square is

When n is divided by 4, the remainder is 3. The remainder when 2n is divided by 4 is:

The midpoints of AB and AC of a triangle ABC are X and Y respectively. If BC+XY=12 units, then BC­XY is