Quantitative Aptitude - Arithmetic Ability Questions

If the perimeter of a semi-circle is 36 cm, then find its radius (in cm).

Find the value of  x3 - y3, if x - y = 4 and xy = 12.

The income of S, T and U are in the ratio of 7 : 9 : 6 and their expenses in the ratio of 4 : 5 : 3. If S saves Rs 2000 out of an income of Rs 14000, then what will be the saving (in Rs) of T?

If 3x+22x+1 = a2x+1+bx+2 be an identity, then the value of b

Out of two numbers, 65% of the smaller number is equal to 45% of the larger number. If the sum of the numbers is 2574, then what is the value of larger number?.

On a ground , there is a vertical tower with a flagpole on its top . At a point 9 m away from the foot of the tower , the angles of elevation of the top and bottom of the flagpole are 60° and 30° respectively . The height of the flagpole is

What is the least number that should be added to the product 11 x 12 x 13 x 14 to make it a perfect square?

Twenty one times of a positive number is less than its square by 100. The value of the positive number is