Question

In each of the following question, select the related number from the given alternatives.
$72$ $:$ $40$ $:$ $:$ $?$ $:$ $30$

• A. $64$
• B. $54$
• C. $66$
• D. $48$

Answer 1

Answer: (B)

$54$

We can follow the pattern as:

$72=18\times 4$

$40=10\times 4$

Similarly,

$54=18\times 3$

$30=10\times 3$

Thus the answer is $54$.

Hence, B is the correct option.