Find the average of first 27 whole

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different. 

Four pairs of numbers have been given, out of which three are alike in some manner, while one is different. Choose out the odd one.

Four letter-clusters have been given out of which four are alike in some manner and one is different. Select the one that is different.

Three of the following four number-pairs are alike in a certain way and one is different. Find the odd one out.

Select the related odd word/letters/number/ figure from the given alternatives.

Four words have been given, out of which three are alike in some manner and one is different. Select the odd word.

Three out of the following four words are similar in meaning. Find the word that is different from the rest.

Four letter- clusters have been given, out of which three are alike in some manner, while one is different. Choose the odd one.

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

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.