Quantitative Aptitude - Arithmetic Ability Questions

Find the difference between place value and face value of 7 in 589573212.

In a cricket match, the scores of the players are considered such that coefficient of variation of scores is 16 and mean is 25 then the variance is

Two trains, one 150 m long and the other 130m long, coming from opposite directions crosssed each other in 7.2 seconds. The sum of speed of the two trains every hour would then be

Mr. Mahesh sold a bus for Rs. 22,100 with a loss of 15%. At what price should the bus be sold to get a profit of 15%?

The standard deviation of the set {10, 11, 12, 9, 8} is

Square of (7 ­- 4x) is

What least number must be subtracted from 518, so that the sum is completely divisible by 13?

The distance between the centres of two circles is 61 cm and their radii are 35 cm and 24 cm. What is the length (in cm) of the direct common tangent to the circles?