Quantitative Aptitude - Arithmetic Ability Questions

For the data given below. find the sum of mode. median and mean.6, 3, 8, 4, 3, 11, 7, 4, 5, 4.

The radii of two concentric circles are 68 cm and 22 cm. The area of the closed figure bounded by the boundaries of the circles is

A boat covers 143 km upstream in 13 hours and the same distance downstream in 11 hours. What is the speed (in km/hr) of the boat in still water?

If cosec 45° - sin 30° = x, then x is

If (-1/2) * ( x - 5) + 3 = -5/2, then what is the value of x?

What is the equation of the line perpendicular to the line 5x + 3y = 6 and having Y-intercept -3?

The compound interest on Rs. 24000 at 10% per annum for 11⁄2 years, interest being compounded semi­annually is

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