Quantitative Aptitude - Arithmetic Ability Questions

What will be the value of xy, if x2+y2 = 45 and x-y=5 ?

AB is a chord of the circle and its center is “O”. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2√11) cm, find the radius (in cm) of the circle.

Volume of a cube is 512 cubic cm, find its total surface area? (Take π = 22/7)

If selling price is Rs. 72 and Gain percentage = 20%, calculate the Cost Price.

When [x + (1/x)] = 5, then what is the value of [x – (1/x)]?

What is the third proportional to 10 and 25?

If cosθ = x2-y2x2+y2, then the value of cotθ is

What is the value of Sin 30° + Cos 30°?