Quantitative Aptitude - Arithmetic Ability Questions

What number should be added to each of 4, 16, 18 and 58 so that the resulting numbers will be in proportion in the given order?

Weight of A and B are in the ratio 11 : 8. A’s weight increases by 40% and the total weight of A and B increases by 30%. What is the percentage increase in the B’s weight?

When [x + (1/x)] = 5, then what is the value of [x – (1/x)]?

Coefficient of x2 in (x + 7)(5 - 3x)(3x - 6) is

What is the value of 2 - 2z + z22 + 2z - z2, when z+2z = 2 ?

If a + b = 10 and ab = 24, then the value of a3 + b3 is

If 2(5x - ­4) -­ 2 < 2x ­- 1 < 4x - ­2; then the value of x is

If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is