Quantitative Aptitude - Arithmetic Ability Questions

If 4x2 - 12x + k is a perfect square, then the value of k is

The number of students in a class is increased by 20% and the number now becomes 66. Initially the number was

Three runners A,B and C run a race, with runner A finishing 12 meters ahead of runner B and 18 meters ahead of runner C, while runner B finishes 8 meters ahead of runner C. Each runner travels the entire distance at a constant speed. The length of the race is

Volume of a cube is 512 cubic cm, find its total surface area? (Take π = 22/7)

The mean of marks secured by 35 students in division A of class X is 65, 45 students of division B is 61 and that of 70 students of division C is 59. What is the mean of marks of the students of three divisions of Class X?

The ratio between Ram's age and Rahim's age is 10:11. What is the age of Rahim in percentage of Ram's age

The number of solutions of the pair of linear equations x + 2y - 8 = 0 and 2x + 4y = 16 is

If x = a + 1a, y = a - 1a ,(a>0), then the value of x4+y4-2x2y2 is