Question

$643145312145174312931$
In the above series, how many $3$'s are there such that $1$ comes immediately after and $4$ comes immediately before $3$?

• A. $5$
• B. $4$
• C. $3$
• D. $2$

Answer 1

The correct option is B $4$

See the given number series. Try to find out $3$ and see if $1$ comes immediately after or not. Also $4$ should be immediately before $3$.

There are two such $3$'s

So $B$ is the correct answer.