Quantitative Aptitude - Arithmetic Ability Questions

What is the difference (in Rs) between the compound interests on Rs. 4000 for 1 year at 12% per annum compounded yearly and half-yearly?

In an examination 65% students pass in history and 55% students pass in hindi. If 5% students failed in both the subjects, then what is the percentage of students who have passed in both the subjects?

If 1/3(12x/5 - 1/2) + 6/5 = 7/6, then what is the value of x?

∆ABC is right angled at B. If m∠A = 30°., then Sec C =?

The cube of 105 is

Tom's father is thrice as old as Tom. 10 years ago Tom's father's age was 7 times his age. What is Tom's current age? 

The radius of a sphere and hemisphere are same. The ratio of their total surface area is

The average of five consecutive even numbers is 40. What is the value of smallest of these numbers?