Quantitative Aptitude - Arithmetic Ability Questions

In an army selection process, the ratio of selected to unselected was 5:1. If 100 less had applied and 20 less selected, the ratio of selected to unselected would have been 6:1. How many candidates had applied for the process?

For triangle PQR, what is the equation of altitude PS if co­ordinates of P, Q and R are (5,1), (0,­4) and (­2,3) respectively?

The angles of depression of two ships from the top of a light house are 45° and 30° toward east. If the ships are 200m apart, the height of the light house is (take √3=1.73)

How much does one need to add to 2/3 to obtain 3/2?

The average monthly salary of 19 members of a group is Rs. 16000. If one more members whose monthly salary is Rs. 20000 has joined the group, then the average salary of the group is

A train travelling at 76 kmph crosses a 450 m long platform in 27 seconds. What is the length of the train?

If the average age of four children is 12 years and the average age of these children and their fathers is 20 years, what is the age of the father?

At 6% simple interest per annum a sum of money became Rs. 834 in 6.5 years. The sum initially invested was