Quantitative Aptitude - Arithmetic Ability Questions

If [2(4x/5 - 3/4)]/3 - 5/3 = -1/6, then the value of x is?

The ratio of present ages of Ranjini and Shahid is 5:4. After 13 years the ratio of their ages will be 6:5. What is Ranjini's present age?

Simple interest on a certain sum of money for 3 years at 10% per annum is half the compound interest on Rs 6000 for 2 years at 10% per annum. The sum placed on simple interest is

The value of cos220° + cos270°is

If x = 2 +√3, y = 2 – √3 and z = 1, then what is the value of (x/yz) + (y/xz) + (z/xy) + 2 [(1/x) + (1/y) + (1/z)]?

Average of the height of 251 students of a school is 48. If the average of the height of the boys is 51 and the average of the height of the girls is 29, then what will be the ratio of the total height of boys and the total height of girls respectively?

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

If 123 x 356 = 43788, then 1.23 x 0.356 = ?