Quantitative Aptitude - Arithmetic Ability Questions

Simple interest on a certain sum of money for 3 years at 18% per annum is half the compound interest on Rs. 9000 for 2 years at 10% per annum. The sum placed on simple interest is:

4*(-­0.1(5.5 + 8.5)) of 0.5 = ?

If x2+1x2-6, then find the value of 2x(x-1)x3-x2-x+1

What is the difference of the cube and square of the common root of (x2 – 8x + 15) = 0 and (y2 + 2y – 35) = 0?

Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.

If a cylinder of radius 7 cm and height 9 cm is melted and constructed into a cone of the same radius, what will be the height of this cone?

If a + b = 8 and ab =15, then a3 + b3 is

Find the value of x if 0.08x + 0.04y = 10 and 0.2(x-1) + 0.4y = 24.8