Question

In the given question, select the related number from the given alternatives.
$42$ $:$ $56$ $:$ $:$ $72$ $:$ $?$

• A. $81$
• B. $90$
• C. $92$
• D. $100$

Answer 1

Answer: (B)

$90$

In this question, each number is obtained by the product of two consecutive numbers.

Like $42=6\times 7$

$56=7\times 8$

$72=8\times 9$

Similarly,

$90=9\times 10$

Hence, B is the correct option.