Quantitative Aptitude - Arithmetic Ability Questions

If the average age of four children is 12 years and the average age of these children and their fathers is 20 years, what is the age of the father?

Z’s present age is 55 years. If 11 years ago, C’s age was 1/11 of Z’s age, then after how many years C’s age will become 37 years?

The numbers x, y, z are respectively proportional to 2, 3, 5 and the sum of x, y and z is 80. If the number z is given by the equation z = ax­-8, then a is

What is that least digit that must be added to the product 5786 × 5784 to make it a perfect square?

If curved surface area of a cylinder is 616 sq cm and height is 14 cm, find its radius?

A's salary was decreased by 50% and subsequently increased by 50%. How much percent does he lose?

Two pipes of length 1.5 m and 1.2 m are to be cut into equal pieces without leaving any extra length of pipes. The greatest length of the pipe pieces of same size which can be cut from these two lengths will be

If x – 4y = 0 and x + 2y = 24, then what is the value of (2x + 3y)/(2x – 3y)?