Quantitative Aptitude - Arithmetic Ability Questions

If the salary of Manoj is 40% less than that of Subhash, then by how much percentage is the salary of Subhash more than that of Manoj?

If 9x2 + 16y2 = 60 and 3x + 4y = 6, then the value of xy is

If (x+1/x) = 5, then the value of 5xx2+5x+1?

If x = 313- 3-13, then 3x3 + 9x value 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?

PQR is a right angled triangle in which PQ = QR. If the hypotenuse of the triangle is 20 cm, then what is the area (in cm2) of the triangle PQR?

If x - y = 6 and xy = 40, then find x2 + y2 ?

If Sec θ = 5/3, then what is the value of Cosec θ?