Quantitative Aptitude - Arithmetic Ability Questions

By which least number should 5000 be divided so that it becomes a perfect square?

A ladder 20 m long is leaning against a vertical wall. It makes an angle of 30 deg with the ground. How high on the wall does the ladder reach?

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

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

The average revenues of 11 consecutive years of a company is Rs 77 lakhs. If the average of first 6 years is Rs 72 lakhs and that of last 6 years is Rs 84 lakhs, What is the revenue for the Sixth year.

Simplify 576b3x2a4z3/36a3b2z

If x = a + 1a, y = a - 1a ,(a>0), then the value of x4+y4-2x2y2 is

If x = 11, the value of x5 - 12x4 + 12x3 - 12x2 + 12x - 1 is