Quantitative Aptitude - Arithmetic Ability Questions

What is the value of S = 11x3x5 + 11x4 + 13x5x7 + 14x7 + 15x7x9 + 17x10 + ... upto 20 terms. Then what is the value of S? 

What is the equation of the line which intercepts x­axis and y­axis at 3/4 and ­2/3 respectively?

The value of a machine depreciates at the rate of 20% per annum. If its present value is Rs 96000, then what was the value (in Rs) of the machine 2 years ago?

The ages of A and B differ by 16 years. If 6 years ago, the elder one was 3 times as old as the younger one, find the present age of the younger between A and B?

If a2+1=9a, (a≠0) then the value of a2+1a2 is

If there are four lines in a plane, then what cannot be the number of points of intersection of these lines?

The diagonal of a square is equal to the side of an equilateral triangle. If the area of the square is 15√3 sq cm, what is the area of the equilateral triangle?

Which of the following condition is sufficient to state that triangle ABC and DEF are similar?