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.
6.
Answer

Answer :

Option C

Explanation :


37 is the only prime number.
7.
Answer

Answer :

Option A

Explanation :


Each of the numbers except 140, is a multiple of 120.
8.
Answer

Answer :

Option C

Explanation :


Each of the numbers except 56, can be expressed in terms of power of 2.
9.
Answer

Answer :

Option B

Explanation :


Each of the numbers except 168, is a perfect square.
10.
Answer

Answer :

Option D

Explanation :


In all numbers except 60, the unit's digit is twice the ten's digit.
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