Quantitative Aptitude - Arithmetic Ability Questions

If a = 1/a-5, then the value of a + 1/a = ?

If x + y = 10 and x2 + y2 = 68, then find xy

If 2 pair of trouser is offered free on purchase of 3 pair of trousers priced Rs 900 each what is the effective discount on each pair of trouser?

If 1-aa3+9 = 19 - a1-a3, then what is the value of a?

Reflection of the point (2,-4) in the origin is

In a right angled triangle if hypotenuse is 20 cm and ratio of other two sides is 4:3, the length of the sides are

A dealer marks his goods 20% above their cost prices. Then,he allows such a discount on the marked price so that he makes a profit of 8%. The rate of discount is:

Triangle PQR is inscribed in the circle whose radius is 14 cm. If PQ is the diameter of the circle and PR = 10 cm, then what is the area of the triangle PQR?