Quantitative Aptitude - Arithmetic Ability Questions

Three numbers are in the ratio of 3:5:10 and their LCM is 630. Find their HCF.

If [2(4x/5 - 3/4)]/3 - 5/3 = -1/6, then the value of x is?

If cosA = x, then x is

The ratio between the area of a square and that of a circle, when the length of a side of the square is equal to that of the diameter of the circle, is (take π=22/7)

A piece of wire 132 cm long is bent successively in the shape of an equilateral triangle, a square and a circle. Then area will be longest in shape of

If 6x + 4(2-x) > 3x -2 > 5x/2 - x/4; then value of x is

Reciprocal of 235?

If the equation 4x + 3y + 5 = 0 and 6x - ky - 7 = 0 have no solution, then the value of k is