Quantitative Aptitude - Arithmetic Ability Questions

If x1/4 + x-1/4 = 2, then what is the value of x81 + (1/x81)?

Calculate the area (in cm2 ) of a circle of radius 10.5 cm.

The area of a rectangle is 120 sq cm and its perimeter 140 cm. What is the length of its diagonal?

If (8x ­- 4) = (3x + 6), then the numerical value of (x + 1)3 is

At 24% discount the selling price of a washing machine is Rs 38000, what is the selling price if the discount is 40%?

Shaan got a total of Rs. 912 in the denomination of equal numbers of Rs. 1, Rs. 5 and Rs. 10 coins. How many coins do Shaan posses?

X and Y undertook to do a piece of work for Rs 5400. X alone could do this work in 18 days and Y alone could do this work in 24 days. With the assistance of Z they finished the work in 8 days. What is the share (in Rs) of Z?

A and B together do a job in 12 days and A could do the job in 20 days if he worked alone. How many days would B take to do the job if he worked alone?