Find out the wrong number in the given sequence of numbers.

36, 54, 18, 27, 9, 18.5, 4.5

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

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

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

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

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

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

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

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.