Reasoning - Classification

Directions to solve :
In each of the following questions, four numbers are given, out of which three are alike in some manner and one is different. Choose the one which is different from the rest three.
21.
Answer

Answer :

Option C

Explanation :


All other numbers contain four consecutive digits in order.
22.
Answer

Answer :

Option A

Explanation :


Each of the numbers except 28, is a perfect cube.
23.
Answer

Answer :

Option A

Explanation :


28 is the only number with all digits even.
24.
Answer

Answer :

Option C

Explanation :


Each of the numbers except 15, is a prime number.
25.
Answer

Answer :

Option B

Explanation :


Each of the numbers except 36, is divisible by 7.
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