Quantitative Aptitude - Arithmetic Ability Questions

If P : Q : R = 6 : 7 : 8 and R : S = 3 : 5, then what is P : S?

Which of the following ratio is greatest?

If secA/(secA ­- 1) + secA/(secA + 1) = x, then x is

A bag contain equal number of 1 rupee, 50 paisa and 25 paisa coins. If the total amount is Rs 105, then how many coins of each type are there?

If 5x/2 - [7(6x - 3/2)]/4 = 5/8, then what is the value of x?

The mean of a distribution is 20 and the standard deviation is 4. What is the value of the coefficient variation?

The mean of a distribution is 21 and the standard deviation is 7. What is the value of the coefficient variation?

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