Quantitative Aptitude - Arithmetic Ability Questions

What is the value of cosec 3π/4?

If a and b are the roots of the equation Px2 – Qx + R = 0, then what is the value of (1/a2) + (1/b2) + (a/b) + (b/a)?

Select the odd word from the given alternatives.

P bought an article for Rs. 1600 and sold it at a profit of 10%. What would have been the increase in the profit percent if it was sold for Rs. 1840?

A racing car going at an average speed of 108 km/hr takes 15 minutes to complete a lap on a racing track. By how much should it increase its speed (inkm/hr) to complete the lap in 12 minutes?

A can do a work in 20 days and B in 10 days. If they work on it together for 5 days, then what fraction of work is left.

P and Q can do a project in 12 and 12 days respectively. In how many days can they complete 50% of the project if they work together?

A shopkeeper by selling 8 iphones, earns a profit equal to the selling price of 3 iphones. His profit percentage is