Quantitative Aptitude - Arithmetic Ability Questions

The sum of a non-zero number and its reciprocal is 2. What is the number?

What is the area (in cm2) of the circumcircle of a triangle whose sides are 6 cm, 8 cm and 10 cm respectively?

Ravi had five subjects in his final examination. The maximum marks in each subject are 100. If his percentage in four subjects is 80, and he scores 65 marks in the fifth subject, determine his overall percentage for the five subjects.

The marked price of an article is Rs 2400. It is sold at two successive discounts of 10% and 15%. What is the selling price (in Rs) of the article?

If x – (1/x) = 3, then what is the value of (2x4 + 3x3 + 13x2 – 3x + 2) / (3x4 + 3)?

If 2x + 3y = 0 and 3x ­- 4y = 34, then x ­- y = ______

The value of 3x9n+1+9x32n-19x32n-6x9n-1 is equal to

If a3- b3= 91 and a - b = 1, then what is the value of ab?