Question

In each of the following question, select the related number from the given alternatives.
$18$ $:$ $30$ $:$ $:$ $36$ $:$ $?$

• A. $54$
• B. $62$
• C. $64$
• D. $66$

Answer 1

Answer: (D)

$66$

We have to find the relation between $18,30$ and this relation will be applied to the next pair. And accordingly we have to check the options.

(i) $18:30$

$\left(30\right)=\left(18\right)\times 2-6$

Above is the relation between $18,30$.

Now applying same relation to the number $36$, we have

$\left(36\right)\times 2-6=66$

So, the correct option is D i.e. answer is $66$.