Quantitative Aptitude - Arithmetic Ability Questions

A, B and C can finish a job working alone in 72, 24 and 36 days respectively. In how many days they can finish the job if they worked together?

Select the odd word/letters/number/number pair from the given alternatives.

cosA/(1 -­ sin A) is equal to

The value of tan(-405°)

The salary of a person is reduced by 20% . To restore the previous salary, his present salary is to be increased by

A solid sphere of diameter 17.5 cm is cut into two equal halves. What will be the increase (in cm2) in the total surface area?

In what time will Rs.4400 become Rs.4576 at 8% per annum interest compounded half-yearly?

In the given figure, ABCD is a square, BCXYZ is a regular pentagon and ABE is an  equilateral triangle. What is the value in deg of EBZ?