Question

In the following series of numbers find out how many times 1, 3 and 7 are together 7 being in the middle and 1 and 3 on either side of 7
2 9 7 3 1 7 3 7 7 1 3 3 1 7 3 8 5 7 1 3 7 7 1 7 3 9 0 6

• A. 3
• B. 4
• C. 5
• D. More than 5

Answer 1

The correct option is A 3

We have to find out how many times $1,3$ and $7$ beign the middle and $1$ and $3$ on either side of $7$.

Basically we have to find

$173$ and

$371$

Lets underline these number in the above sequence and count them.

the number $173$ comes thrice

hence, option $A$ is the correct answer.