Quantitative Aptitude - Arithmetic Ability Questions

If p/q = (x+3)/(x-3), then what is the value of p2+q2p2-q2 ?

A train travelling at the speed of 66 kmph crosses a 300 m long platform in 24 seconds. How long was the train?

Amit can complete a work in 25 days and Punit can complete the same work in 20 days. Punit alone worked at it for 10 days and then left the work. In how many days will Amit alone complete the remaining work?

The simple interest accrued on a sum of money at the end of four years is 1/5th of its principal. What is the rate of interest per annum?

If 2/3(6x/5 - 1/4) + 1/3 = 9x/5, then what is the value of x?

If a2+b2=80 and ab = 32, then calculate the value of a-b/a+b.

The ratio of the cost price and selling price of a bulb is 15 : 18. What is the profit percentage?

The average of five consecutive even numbers is 40. What is the value of smallest of these numbers?