Quantitative Aptitude - Arithmetic Ability Questions

If 7x ­- 5y = 13 and 2x -­ y = 5, then (x -­ y) is

The four sides of a quadrilateral are in the ratio of 2:3:4:5 and its perimeter is 280m. The length of the longest side is

Sum of two numbers is thrice their difference. Their ratio is

If sin3A = x, then value of x is

If cot(A/2) = x, then the value of x is

Two whole numbers are such that the square of first number exceeds the second by 112 and the ratio of the numbers is 4:3. What is thevalue of smaller number?

If the shopkeeper sells an item at Rs 4400 which is marked as Rs 5000, then what is the discount that he is offering?

If a website is selling smartphone at Rs 18,000 which is marked at Rs 25,000, then what is the discount (in %) at which the smartphone is being sold?