Question

Group the following figures into three classes using each figure only once.

• A. $1,2,3;4,5,6;7,8,9$
• B. $1,3,4;2,5,8;6,7,9$
• C. $2,4,7;5,8,9;1,3,6$
• D. $2,5,8;1,4,7;3,6,9$

Answer 1

The correct option is B $1,3,4;2,5,8;6,7,9$

$\Rightarrow$ $1,3,4$ have $2$ same element placed inside.

$\Rightarrow$ $2,5,8$ have $2$ different element placed inside.

$\Rightarrow$ $6,7,9$ have $1$ same element placed inside.

$\therefore$ Correct answer is option $B$.