# 9th Class Mental Ability Classification Classification

Classification

Category : 9th Class

WHAT IS CLASSIFICATION?

In this topic a set of four objects/elements/things is provided, out of them three are similar in some way, while the other one is different. A student has to choose the odd one out.

EXAMPLE

1.         Choose the odd one out.

(a) AdFi                         (b) BeGj                        (c) CfHl                         (d) Dgll

Explanation (c):

In options (a), (b) and (d), the gap between 1st and 2nd letter as well as 3rd and 4th letter is of 2 letters.

While the gap between 2nd and 3rd letter is of 1 letter according to the English Alphabet sequence as shown below.

Option (a): A  d  F  i

Option (b): B  e  G j

Option (c): C  f  H  1

Option (d): Dg      I  1

Clearly only in option (c), there is a gap of 3 letters between last two letters.

2.         Choose the odd one out.

(a)$\left( 1-1 \right)$                    (b)$\left( 7-341 \right)$                (c)$\left( 4-64 \right)~$               (d) $\left( 10-1000 \right)$

Explanation (b):

In each pair, the second number is the cube of the first number as shown below.

Option (a): ${{1}^{3}}=1$

Option (b): ${{7}^{3}}\ne 341$

Option (c): ${{4}^{3}}=64$

Option (d): ${{10}^{3}}=1000$

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