Question 13

Explanation

We analyze the pattern of changes between terms in the sequence $1, 3, 5, 4, 12, 14, 13, \dots$

The pattern formed is as follows:

It can be seen that the repeating pattern is multiply by 3, add 2, and subtract 1 ($\times 3, +2, -1$).

Therefore, the next operation after $-1$ is multiply by 3:

So, the correct value to complete the sequence is $39$.