Reasoning - Classification

Directions to solve :
In each of the following questions, four letters or letter groups have been given, out of which three are alike in some manner and the fourth one is different. Choose out the odd pair.
21.
Answer

Answer :

Option A

Explanation :


This is the only group containing a vowel.
22.
Answer

Answer :

Option D

Explanation :


In all other groups, the first two letters are consecutive and third letter is 2 letters ahead of the second.
23.
Answer

Answer :

Option D

Explanation :


No letter is repeated in any other group.
24.
Answer

Answer :

Option B

Explanation :


In all other groups, first letter occupies the same position from the beginning of the alphabet as is occupied by the second letter from the end of the alphabet.
25.
Answer

Answer :

Option A

Explanation :


Each of the other groups contains two consecutive letters, e.g. TU in TUESDAY and SATURDAY and RS in THURSDAY.
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