Quantitative Aptitude - Arithmetic Ability Questions

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

A scored 72% in a paper with a maximum marks of 900 and 80% in another paper with a maximum marks of 700. If the result is based on the combined percentage of two papers, the combined percentage is

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.

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

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

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