Quantitative Aptitude - Arithmetic Ability Questions

The 3rd and 8th term of an arithmetic progression are -14 and 1 respectively. What is the 11th term?

If 2cosAsinB = x, then the value of x is?

The average of 100 observations was calculated as 35.It was found later, that one of the observation was misread as 83 instead of 53. The correct average is :

Determine the value of ‘r’ for which the equation 13x + 5 = rx + 18 has no solution.

Find the odd word/letters/number from the given alternatives.

If x + y = 3, then what is the value of x3 + y3 + 9xy?

If x-1x = 10, then find the value of x4+1x2

30% discount is offered on an item. By applying a promo code the customer wins 20% cash back. What is the effective discount?