Quantitative Aptitude - Arithmetic Ability Questions

Anil can do a piece of work in 14 days which Rohit can do in 21 days. They worked together for few days after which Anil left. If Rohit worked alone for 3 days, find the total number of days it took to complete the whole work.

√(cosec2 -­ 1)/cosecA is equal to?

An 80 litre mixture of water and acid contains 20% acid. How much acid should be added to make the acid 60% in the new mixture?

If 3a – (3/a) – 3 = 0, then what is the value of a3 – (1/a3) + 2?

What is the simplified value of 12-13 ?

If x -­ y = ­7 and x + y = 13, then x2 - y2 is

Find the value of 777777?

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.