Quantitative Aptitude - Arithmetic Ability Questions

Pipe A can fill an empty cistern in 4 hours while along with Pipe B it can fill it up in 3 hours. Only Pipe A is turned on for an hour after which Pipe B is also turned on. How much total time will it take to fill up the cistern?

The average marks of 10 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 34 instead of 43. What is the correct average?

The triangle in which the orthocenter, circumcentre, Incenter and the centroid coincide each other at a point is known as _____________.

The lengths of the two diagonals of a rhombus are 5 cm and 12 cm. Find its area (in cm2)

A 600 metres long train is running at the speed of 81 km/hr. If it crosses a platform in 40 seconds, then what is the length of the platform (in metres)?

The ratio of the cost price and selling price of an article is 5 : 3. What is the loss percentage?

Five men or ten women can complete a job in 20 days. In how many days can 3 men and 4 women complete it?

What will be the value of xy, if x2+y2 = 45 and x-y=5 ?