Question

Find out the wrong number in the series given below :
$3,5,12,36,113,350$

• A. $36$
• B. $113$
• C. $350$
• D. $5$

Answer 1

The correct option is C $350$

We calculate and observe the difference of the two consecutive numbers.
$2\text{nd term}-1\text{st term}=2=3^1-1$
$3\text{rd term}-2\text{nd term}=7=3^2-2$
$4\text{th term}-3\text{rd term}=24=3^3-3$
$5\text{th term}-4\text{th term}=77=3^4-4$
$6\text{th term}-5\text{th term}=237\ne 3^5-5$

$\therefore$ As per the pattern, $6\text{th}$ term should be $351$ not $350$.