Quantitative Aptitude - Arithmetic Ability Questions

If x + y = 12 and x2 + y2 = 94, then xy is 

While selling a watch, a shop-­keeper gives a discount of 5%. If he gives a discount of 7%, he earns Rs.15 less as profit. The marked price of the watch is

What is the value of sin 5π/3?

If 7x - [3(2x - 3)]/2 = 1/2, then what is the value of x?

If a cylinder of radius 4.3 cm and height 4.8 cm is melted and constructed into a cone of the same radius, what will be the height of this cone? (Use π = 22/7)

What is the average of 36, 43, 51, 68, and 77?

The surface areas of three faces of a cuboid sharing a vertex are 20, 32 and 40 sq. mts. What is the volume of the cuboid in cub. m?

If 2x-2x=1 (x≠0),then the value of x3-1x3 is