Quantitative Aptitude - Arithmetic Ability Questions

Two whole numbers are such that the cube of first number exceeds the cube of second by 61 and the ratio of the numbers is 5:4. What is the value of larger number?

The prices of chairs and tables are in the ratio of 9 : 5. If the chairs cost Rs. 4200 more than the tables, find the price of the tables? (in Rs.)

A tower stands on the top of a building which is 40 metres high. The angle of depression of a point situated on the ground from the top and bottom of the tower are found to be 60 and 45 deg respectively. What is the height (in metres) of tower?

If x2+y2+z2-8x+6y-4z+29 = 0, then find the value of z(x+y).

If 2x+29x = 4, then the value of 27x3+127x3

Convert binary 1101111 to decimal.

If 15 persons can do a job in 30 days, then 30 persons with twice the efficiency can do the same job in how many days?

The area of a semicircle is 308 sq.cm. Calculate its perimeter (in cm)