Question

Find the term to replace the question mark in order to complete the series.

$3,8,35,48,?,120$

• A. $64$
• B. $72$
• C. $80$
• D. $99$

Answer 1

Answer: (D)

$99$

$3=2^2-1,8=3^2-1:$
$35=6^2-1,48=7^2-1:$
$?={10}^2-1,120-{11}^2-1$.

Thus looking at the above trend, the number $99$ replaces the question mark.