Quantitative Aptitude - Arithmetic Ability Questions

A shopkeeper by selling 13 Titan watches, earns a profit equal to the selling price of 3 Titan watches. His profit percentage is

If sin ­- 5π/3 = x, then the value of x is

What is the Compound interest on Rs. 5000 in 3 years, if the rate of interest is 4% for the first year, 3% for the second year and 2% for the third year?

Select the odd letters from the given alternatives.

If the sum of the measures of all the interior angles of polygon is 2340°. What is the number of sides of the polygon?

If x = 2 +√3, y = 2 – √3 and z = 1, then what is the value of (x/yz) + (y/xz) + (z/xy) + 2 [(1/x) + (1/y) + (1/z)]?

What is the value of sin(11π/6)?

What is the value of xy if x - y = 3 and x2+y2=15?