Quantitative Aptitude - Arithmetic Ability Questions

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

Select the related word/letters/number from the given alternatives.
1 : 8 :: ? :64

The amount received at 10% per annum compound interest after 3 yrs is Rs 10,648. What was the principal (in Rs)?

Find the total surface area (in cm2 ) of a hemisphere of diameter 42 cm.

A 220 metres long train takes 33 seconds to cross a 440 metres long bridge. How much time (in seconds) will the train take to cross a 350 metres long bridge?

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

Select the odd word from the given alternatives.