Quantitative Aptitude - Arithmetic Ability Questions

A and B can do a piece of work in 72 days. B and C can do it in 120 days and A and C can do it in 90 days. A alone can do it in:

Rahul can complete a work in 18 days and Sonu can complete the same work in 15 days. If both together work for 5 days, then what part of total work is left?

If (a+1a)2=3,then the value of a6-1a6 will be

If the product of two numbers is 2522 and their LCM is 97 then their HCF is

The difference between compound interest and simple interest on a certain sum of money for 2 years at 5% per annum is Rs. 41. What is the sum of money?

What is the value of cos 11π/6?

A shopkeeper marks up his wares by 60% and offers 25% discount. What will be the selling price (in Rs) if the cost price is Rs 1600?

The slope of the line passing through the points (-5,1) and (x,-4) is -5/8. Find x.