Quantitative Aptitude - Arithmetic Ability Questions

The value of  (0.3)2/100=?

A student has to secure 40% marks to pass. He gets 67 and fails by 13 marks. What is the maximum marks?

Two trains are running in opposite directions with the same speed. If the length of each train is 486 metres and they cross each other in 27 seconds, then what is the speed (in km/hr) of each train?

The ratio of present ages of P and Q is 5 : 8. Three years later their ages will be in ratio 8 : 11. What is the present age (in years) of Q?

Two cars travel from city A to city B at a speed of 42 and 60 km/hr respectively. If one car takes 2 hours lesser time than the other car for the journey, then the distance between City A and City B is:

A plane flies a distance of 1800 km in 5 hours. What is its average speed in meters/second?

A discount series of 15%, 20% and 25% is equal to the single discount of?

Solve the following equation to find x: (x − 2)2 − 36 = 0 : xεN