Quantitative Aptitude - Arithmetic Ability Questions

A can do a piece of work in 8 days and B can do it in 10 days seperately. How many days would it take for both A and B to finish the same work together?

Find the mean value of 2, 3, 3, 4, 6, 7

The numbers x, y, z are respectively proportional to 2, 3, 5 and the sum of x, y and z is 80. If the number z is given by the equation z = ax­-8, then a is

If a+1a2 = 3, then the value of a18+ a12+a6 + 1 is

In the following question, select the odd number from the given alternatives.

Select the odd number from the given alternatives.

If P = 5X and Q = X, then P is how much percentage more than Q?

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