Quantitative Aptitude - Arithmetic Ability Questions

Some masons promised to do a work in 10 days but 8 of them were absent and remaining did the work in 18 days. What was the original number of masons?

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

Find out the odd word/letters/number/number pair from the given alternatives.

If the standard deviation of a population is 6.5, what would be the population variance?

Which of the following is correct?

What is the value of ( 1/3 - cosec30°) ?

By selling a used phone for Rs.6,160 Rajan got 44% less than what it cost him to buy it a few years ago. At what price should Rajan have been able to sell it to make a profit of 5%?

The angles of depression of two ships from the top of a light house are 60° and 45° towards east. If the ships are 300 m apart, the height of the light house is