Quantitative Aptitude - Arithmetic Ability Questions

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Rs. 1. The sum (in Rs.) is:

If x stands for addition, / stands for subtraction, + stands for multiplication and - stands for division, then what is the value of 20 x 8 / 8 - 4 + 2 ?

Ms. Sushmitha borrowed Rs. 900 at 6% per annum simple interest. What amount will she pay to clear her debt after 4 years?

A 600 metres long train is running at the speed of 81 km/hr. If it crosses a platform in 40 seconds, then what is the length of the platform (in metres)?

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

What is the value of cosecA/√(cosec2A ­- 1)?

What is the value of cos 4π/3?

ΔDEF is right angled at E. If m∠D = 45°, then find the value of (tanF + 1/3).