# Reasoning - Classifications

As we know that various objects possess various properties so we can group those objects who have properties common to all. This phenomena of grouping various objects on basis of their common properties is known as classification. Classification allows us to make a systematic and a homogeneous group out of a heterogeneous group.

Questions relating to classification normally enable the examiner to check the candidate’s ability to classify given objects. Classification questions are normally of three types and they are −

### Alphabet classification

In this type of classification, letters of alphabet are classified in a group using a particular method or rule.

### Words classification

In this type of classification, different objects are classified on the basis of common features and properties.

### Miscellaneous classification

In this type of classification, any rule other than alphabet or words can be implemented for grouping.

1 - Three of the following four are same in a certain way and hence form a group. Find out the one which does not belong to that group.

Options

A - db

B - centimetre

Explanation − All other terms are units to measure sound.

2 - Three of the following four are same in a certain way and hence form a group. Find out the one which does not belong to that group.

Options

A - Swans

B - Geese

C - Duck

D - Cuckoo

Explanation − All others are water-birds except cuckoo.

3 - Three of the following four are same in a certain way and hence form a group. Find out the one which does not belong to that group.

Options

A - Mercury

B - Bronze

C - Silver

D - Iron