Quantitative Aptitude - Arithmetic Ability Questions

The ratio of number of boys and girls in a school of 720 students is 7 : 5 . How many more girls should be admitted to make the ratio 1 : 1 ?

In an army selection process, the ratio of selected to unselected candidates was 4:1. If 90 less had applied and 20 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?

A fan is listed at Rs. 150 with a discount of 20% . What additional discount must be offered to the customer to bring the net price to Rs. 108 ?

If a - b = 1 and ab = 6, then what is the value of a3- b3?

What should be the average speed of a car to cover a distance of 189 km in 3.5 hours?

20 boys do one fourth of work in 25 days. How many more boys will be required to complete the remaining work in 50 days?

The flight fare between two cities is increased in the ratio 11:13. What is the increase (in Rs) in the fare, if the original fare was Rs 12100?

If Sec θ = 25/24 , then what is the value of Sin θ?