Answer:
6
Explanation:
In the sequence we see that between terms 1 and 2 there is a difference equal to 34 - 27 = 7, between terms 2 and 3 there is a difference equal to 27 - 20 = 7, between terms 3 and 4 there is a difference equal to 20 - 13 = 7. This constant difference allows us to predict the 5th term as follows:
13 - 5th term = 7
13 - 7 = 5th term
6 = 5th term