9th Class Mental Ability Classification Classification

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): D\[\]g \[\]     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): \[{{10}^{3}}=1000\]