Quantitative Aptitude - Arithmetic Ability Questions

The LCM of 14, 21 and 35 is

If cos -4π/3 = x, then the value of x is

What are the roots of the quadratic equation: x2 + 3x ­- 154 = 0

If the areas of two similar triangle are in the ratio 5 : 7, then what is the ratio of the corresponding sides of these two triangles?

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?

On Selling a book at 9/14 of the marked price there is loss of 10%. What will be the ratio of marked price and cost price of the book?

Slit 69 into three parts such that they are in A.P. and the product of their smaller parts is 483.

If (x - 13)2 + (y - 4)2 = 0, then the value of y + xy - x ?