Quantitative Aptitude - Arithmetic Ability Questions

The simple and compound interest that can be earned in two years at the same rate is Rs 1500 and Rs 1575 respectively. What is the rate (% per annum) of interest?

If sinA + sin2A =1 then what is the value of cos2A + cos4A

If the circumference of a circle is 44 cm, then what must be its area (in cm²)?

If x -­ y = ­7 and x + y = 13, then x2 - y2 is

A tetrahedron has 4 vertices. How many edges does it have?

If the selling price is Rs 1680 after getting a discount of 16%, what was the marked price?

If [a + (1/a)]2 – 2[a – (1/a)] = 12, then which of the following is a value of 'a'?

If x + y = 3, then what is the value of x3 + y3 + 9xy?