Question

In each of the following question, select the related number from the given alternatives.
$7$ $:$ $48$ $:$ $:$ $12$ $:$ $?$

• A. $143$
• B. $84$
• C. $121$
• D. $112$

Answer 1

The correct option is A $143$

$7^2-1=49-1=48$

Similarly,

${12}^2-1=144-1=143$

Hence, A is the correct option.