Quantitative Aptitude - Arithmetic Ability Questions

What is the value of sec 4π/3?

Expand and simplify (x + 5)2 + (x - 3)2

The simple interest on a sum for 5 years is Rs 16800. The rate of interest for the first 3 years is 8% per annum and for the next 2 years is 12% per annum. What is the value (in Rs) of sum?

In an army selection process, the ratio of selected to unselected was 3:1. If 60 less had applied and 30 less selected, the ratio of selected to unselected would have been 5:1. How many candidates had applied for the process?

In a rectangle _____.

The perimeter of a square is 30 cm. Find its area (in cm²).

If Cot θ = 21/20, then what is the value of Cosec θ?

If x - 2y = 2 and 3x + y = 20, then the value of (x,y) is