The fourth term is 21 while the fifth term is 25
Here, we are interested in completing the sequence. To complete this sequence, we need to get the general rule for the terms in the sequence
We can see that by adding 4 to the previous term , we gat the next term
This is obtainable from the sequence by seeing that;
5 + 4 = 9
9 + 4 = 13
13 + 4 = 17
So to get the fifth term, we will need to add 4 to the fourth term
In this case, that will be 4 + 17 = 21
To get the sixth term, we will need to add 4 to the fifth term
Mathematically, that will be 21 + 4 = 25
