Quantitative Aptitude - Arithmetic Ability Questions

From the top of a platform 5 m high, the angle of elevation of a tower was 30 deg. If the tower was 45 m high, how far away from the tower was the platform positioned?

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

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

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

The length of the two adjacent sides of a rectangle inscribed in a circle are 5 cm and 12 cm respectively. Then the radius of the circle will be

For the figure given below, find the value (in degrees) of 2∠A + ∠B.

What is the altitude of an equilateral triangle whose side is 12√3 cm?

Which of the following is the CORRECT option for the triangles having sides in the ratio of 3:4:6?