Question

In each of the following question, select the related number from the given alternatives.
$2$ $:$ $7$ $:$ $:$ $6$ $:$ $?$

• A. $40$
• B. $39$
• C. $50$
• D. $72$

Answer 1

The correct option is B $39$

This is a number analogy question of type a:b::c:d

The relation between a and b is same as between c and d

Here given as $2:7::6:?$

Now, $7=2^2+3$

So, we get the relation as$b=a^2+3$

Similarly, $d=c^2+3$

$\therefore d=6^2+3=39$

Hence, the missing number is $39$.