Quantitative Aptitude - Arithmetic Ability Questions

X can do a piece of work in 'p' days and Y can do the same work in 'q' days . Then the number of days in which X and Y can together do that work is

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

AB is a chord of the circle and its center is “O”. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2√11) cm, find the radius (in cm) of the circle.

The selling price of an article is 8/5th of its cost price. Then the gain percentage is

Two students appeared for an examination. One of them secured 13 marks more than the other and his marks were 76% of the sum of their marks. The marks obtained by them are

What is the simplest form of (1 + cosA)(cosecA ­ cotA)?

Simplify (b5x2a3z4)*(b3x2a4z5) / (a2b3z2)

In the following question, select the odd letter/letters from the given alternatives.