Can you replace the question mark with the number to complete the series, provided the pair of numbers exhibits a similar relationship?
? : 4623 :: 9 : 647	Choices: A) 16 B) 17 C) 18 D) 19 E) 20
Solution:   17   Explanation :   The relationship holds for below formula :   pow(x,3) - pow(x,2) - 1   =&gt; 9*9*9 - 9*9 - 1   =&gt; 729 - 81 - 1= 
<gadget id="calculator">729 - 81 - 1</gadget>
<output>647</output>
&gt; 647   Similarly,   17*17*17 - 17*17 - 1=&gt; 4913 - 289 - 1= 
<gadget id="calculator">4913 - 289 - 1</gadget>
<output>4_623</output>
&gt; 4623   Answer 17
<result>B</result>
Can you replace the question mark with the number to complete the series, provided the pair of numbers exhibits a similar relationship?
? : 4623 :: 9 : 647