Quantitative Aptitude - Arithmetic Ability Questions

Marked price of an article is Rs 3600 and selling price is Rs 3132. What is the discount percentage?

If x +y = √3 and x - y = √2, then the value of 8xy (x2 + y2) is

If a-1a=7,then a2+1a2=?

The length of the diagonal of a square is 14 cm. What is area of this square?

If by increasing the price of a ticket in the ratio 8:11 the number of tickets sold fall in the ratio 23:21 then what is the increase (in Rs) in revenue if revenue before increase in price of ticket was Rs 36,800?

A piece of work was finished by A, B and C together. A and B together finished 60% of the work and B and C together finished 70% of the work. Who among the three is most efficient?

Cost price of a calculator is Rs 495. If the profit percentage is 40%, then what is the value (in Rs) of profit?

Krishna cycled a distance of 90 km at a certain speed. If he cycled 3 km slower every hour, he would have taken 5 more hours to reach his destination. What is the speed in kmph at which Krishna actually cycled?