Quantitative Aptitude - Arithmetic Ability Questions

What will be the average of all the prime numbers before 19?

What is the sum of the first 17 terms of an arithmetic progression if the first term is -20 and last term is 28?

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

Select the odd letters from the given alternatives.

Select the odd word/letters/number/number pair from the given alternatives.

The ratio of salary of u, v and w is 8 : 7 : 13. If w gets Rs 3384 more than that of v, then what is the salary (in Rs) of u?

From the top of a 20 m high building, the angle of elevation of the top of a tower is 60° and the angle of depression of it's foot is at 45°, then the height of the tower is (√3=1.732)

What is the difference between the maturity values, if Rs. 12500 is invested for 2 years at 20% per annum simple interest and compound interest?