Quantitative Aptitude - Arithmetic Ability Questions

The first and last terms of an arithmetic progression are 37 and ­18. If the sum of the series is 114, then it has how many terms?

The mean of a distribution is 15 and the standard deviation is 5. What is the value of the coefficient variation?

Select the odd word/letters/number/number pair from the given alternatives.

The area of the circle with radius Y is W. The difference between the areas of the bigger circle (with radius Y) and that of the smaller circle (with radius X) is W'. So x/y is equal to

A sum becomes Rs 8800 in 4 years at simple interest at the yearly interest rate of 25% per annum. What is the sum (in Rs)?

Two circles are having radii 9 cm and 12 cm. The distance between their centres is 15 cm. What is the length (in cm) of their common chord?

Ram's father is twice as old as Ram is. Eight years ago the age of Ram's father was 2.5 times his age. What is Ram's current age?

After a discount of 34% an article is sold for Rs. 3168. What is the marked price (in Rs) of the article?