Quantitative Aptitude - Arithmetic Ability Questions

Find the odd words/letter/number from the given alternatives:

The LCM of 48 and 54 is

Coefficient of x in (x + 11)(3 -­ 5x) is _____.

What is the value of 26 + 152?

If cos(A-B) - cos(A+B) = x, then the value of x is

Manish lent out Rs 20000 in two parts. He put out first part at 6% and the second part at 8% interest. The yearly average interest comes out to be 6.4%.What are the amounts (in Rs) that were lent at 6% and 8% respectively?

Find the mean of the first 6 prime numbers?

What is the sum of the first 11 terms of an arithmetic progression if the 4th term is 11 and the 7th term is -4?