Quantitative Aptitude - Arithmetic Ability Questions

If sec (3x – 20°) = cosec (3y + 20°), then what is the value of tan (x + y)?

Jalal, Amit and Feroz enter into partnership. Jalal invests 4 times as much as Amit and Amit invests three-fourth of what Feroz invests. At the end of the financial year, the total profit earned is Rs. 19,000. Find the share for Jalal.

The value of cos220°+cos270° is

If the successive discounts be 20% , 10% and 5% , then the single equivalent rate of discount is

If 2x + 6y = 3xy and 10x -­ 3y = 4xy, find x, y.

If P = 7 + 4√3 and PQ = 1, then what is the value of 1/P2 + 1/Q2?

A wooden bowl is in shape of a hollow hemisphere of internal radius 7 cm and thickness 1 cm. What is the total surface area (in sq.cm) of the bowl? (Take:  = 22/7)

20 kg of a mixture of wheat and husk contains 5% husk. How many kg more of husk must be added to make the husk content 20% in the new mixture?