What can be the maximum interval between two

Three of the four letter-clusters are alike in a certain way and one is different. Pick the odd one out.

In the following question, select the odd pair of numbers from the given alternatives.

Select the word which does not belong to the same group 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.

Statement:

Only a few Gold are Silver

No Gold are Diamond

Conclusion:

I. Some Silver are not Diamond 

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

Arrange the letters of each group to make a meaningful word and find the odd one out.