Question

Find out the missing number in the series given below :
$6,13,28,59,?,249$

• A. $124$
• B. $122$
• C. $120$
• D. $118$

Answer 1

The correct option is B $122$

$\text{2nd term}=\text{1st term}\times 2+1$
$=6\times 2+1=13$
$\text{3rd term}=\text{2nd term}\times 2+2$
$=13\times 2+2=28$
$\text{4th term}=\text{3rd term}\times 2+3$
$=28\times 2+3=59$
$\text{5th term}=\text{4th term}\times 2+4$
$=59\times 2+4=122$
$\text{6th term}=\text{5th term}\times 2+5$
$=122\times 2+5=249$

Hence, the missing term is $122.$