Quantitative Aptitude - Arithmetic Ability Questions

If ab = 21 and a+b2a-b2 = 254,then the value of a2+b2+3ab

What is the value of [cos (90 + A)÷sec (270 – A)] + [sin (270 + A)÷cosec (630 – A)]?

At 20% discount the selling price of an article is Rs 2400, what is the selling price (in Rs) if the discount is 32.5%?

Rs 11,550 has to be divided between X, Y & Z such that X gets 4/5 of what Y gets and Y gets 2/3 of what Z gets. How much more does Z get over X (in Rs)?

In a trapezium ABCD, AB and DC are parallel sides and ∠ ADC = 90°. If AB = 15 cm, CD = 40 cm and diagonal AC = 41 cm. Then the area of the trapezium ABCD is

In the given figure,PQ = PS = SR and QPS = 40 deg, then what is the value of QPR (in deg) ?

If 10 people can do a job in 20 days,then 20 people with twice the efficiency can do the same job in

Mandeep works 3 times as fast as Sampat. If Sampat can complete a job alone in 60 days, then in how many days can they together finish the job?