Quantitative Aptitude - Arithmetic Ability Questions

If a + b = 8 and ab =15, then a3 + b3 is

If 2x - 3 = 3x - 5, then the numerical value of (x - 3)2 is

Find the simple interest on Rs. 50 for 6 months at the rate of 10 paise per rupee per month.

Vishal is 20 years younger to Arya. Twelve years hence Arya's age will be 1.25 times that of Vishal. Aryais now ......... years old.

The first and last terms of an arithmetic progression are 29 and -49. If the sum of the series is -140, then it has how many terms?

1/3 part of a certain journey is covered with the speed of 25 km/hr, 1/2 part of the journey is covered with the speed of 45 km/hr and the remaining part covered with the speed of 37.5 km/hr. What is the average speed (in km/hr) for the whole journey?

In what time will a 100 metre long train running with a speed of 50 km/hr cross a pillar?

If a triangle has its orthocenter and centroid of equal length, then which of the following is TRUE about the triangle?