Quantitative Aptitude - Arithmetic Ability Questions

What is the effective discount on two successive discounts of 20% and 25%?

Find the greatest number that will divide 390, 495 and 300 without leaving a remainder

A moving train passes a platform 50m long in 14 seconds and a lamp post in 10 seconds. The speed of the train (in km/h) is :

Cost price of 28 articles is equal to Sale price of 21 articles, then percentage of profit is

In ΔABC, ∠B = 70° and ∠C = 60°. The internal bisectors of the two smallest angles of ΔABC meet at O. The angle so formed at O is

Two cars travel from city A to city B at a speed of 30 and 36 km/hr respectively. If one car takes 3 hours lesser time than the other car for the journey, then the distance between City A and City B is

If a + b = 10 and ab = 24, then what is the value of a3 + b3?

If a3+ b3 = 19 and a + b = 1, then what is the value of ab?