Quantitative Aptitude - Arithmetic Ability Questions

If cos 60° - sec 30° = x, then the value of x is

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 16% per annum is Rs 320. What is the value of given sum (in Rs)?

The mean score in a test of the 10 boys in a class was 15 while the overall mean of the 25 students in the class was 16.2. What was the mean score of the girls?

What is the value of Cot 45° + Cosec 60°?

What is the value of (4a2 + 8b + 14c + 2)/2 ?

What is the HCF of 36, 72 and 126?

If the product of two numbers is 2522 and their LCM is 97 then their HCF is

Select the odd letters from the given alternatives.