Question

Find the missing term :

$3,15,35,63,?,143$

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

Answer 1

The correct option is D $99$

Here, the pattern is as:
${\left(Number\right)}^2-1$ where the numbers are even i,e., 2, 4, 6, 8 ....
Clearly, ${\left(10\right)}^2-1$ = 99
Hence, option (D) is the correct answer.