Question

Which number should replace ? to complete the series

$8:28::27:?$

• A. $8$
• B. $28$
• C. $64$
• D. $65$
• E. None of these

Answer 1

The correct option is D $65$

Here, the relationship is $x^3:(x+1{)}^3+1$.
Clearly, 27 is $3^3$, therefore, $(3+1{)}^3+1$ = $65$
Hence, option (D) is the correct answer.