Quantitative Aptitude - Arithmetic Ability Questions

If x/2 - [4(15/2 - x/3)]/3 = -x/18, then what is the value of x?

If cos2x + cos4x = 1, then tan2x + tan4x =

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

From a point P, the angle of elevation of a tower is such that its tangent is 3/4. On walking 560 metres towards the tower the tangent of the angle of elevation of the tower becomes 4/3. What is the height (in metres) of the tower?

If sum of Rs.1000 amount to Rs.1331 in 3 years, compounded annually. Then, find the rate of interest per annum?

The sum of three numbers is 252. If the first number is thrice the second and third number is two-third of the first, then the second number is

If the diameter of a hemisphere is 21 cm, then what is the volume (in cub.cm) of hemisphere?

Incentre of Δ ABC is I. ∠ABC = 90° and ∠ACB = 70°. ∠AIC is