Quantitative Aptitude - Arithmetic Ability Questions

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

The average of 6 consecutive integers is 15/2. What is the average of last three integers?

Selling price of a watch is Rs 966 and profit percentage is 15%. If selling price is Rs 798, then what will be the loss percentage?

A  field  can  be  reaped  by  12  men  or  18  women  in  14  days.  In  how  many  days  can  8  men  and  16 women reap it?

The ratio of three numbers is 2 : 3 : 5. If the sum of the three numbers is 275, then what is the largest among the three numbers?

If Sin x = 4/5, then Cosec x + Cot x =

What is the value of 1+aa1/2+a-1/2-a1/2+a-1/21+a+a-1/2 ?

If 7x - (3/2) * (4x - 9) = 6.5, then the value of x is?