Quantitative Aptitude - Arithmetic Ability Questions

If A is 6 times more than B, then by what percentage is B is less than A?

Select the odd word/letters/number/number pair from the given alternatives.

If 3x + 4y – 2z + 9 = 17, 7x + 2y + 11z + 8 = 23 and 5x + 9y + 6z – 4 = 18, then what is the value of x + y + z – 34?

The expression 52n –23n has a factor?

If x + (1/x) = 2, then what is the value of x21 + (1/x1331)?

The area of a rectangle in 60 sq.cm and its perimeter is 34 cm, then the length of the diagonal is

18 men or 36 boys working 6 hours a day can plough a field in 24 days. In how many days will 24 men and 24 boys working 9 hours a day plough the same field ?

To cover a distance of 225 km in 2.5 hours what should be the average speed of the car in meters/second?