Quantitative Aptitude - Arithmetic Ability Questions

Find the sum of interior angles of a dodecagon?

The difference between Peter and Preeti's ages is 5 years. When they married each other 35 years ago, 4 times Peter's age was the same as 5 times the age of Preeti. What is the current sum of their ages?

The effective annual rate of interest corresponding to a nominal rate of 19% per annum payable half­yearly is:

In a fraction when 3 is added to its numerator and denominator it becomes 4/5. And it becomes 1/2 when 2 is subtracted from both the numerator and denominator. Find the fraction.

The sum of the cubes of two numbers in the ratio 3 : 4 is 5824. The sum of the numbers is:

Find the radius of the circle if the length of its arc is 33 cm whose corresponding central angle is 90° ?

What is the reflection of the point (3, 2) in the line y = -2?

Mr. Devesh borrowed Rs.4,500 at 4% per annum compound interest. The compound interest compounded annually for 2years is