number sequences Nth term?

[Rushton]

please help me do the sequence to the formula the first 10 terms

3n
4n
n + 1
11-n
1) 3,6,9,12,15,18,21,24,27,30
2) 4,8,12,16,20,24,28,32,36,40
3) 1,2,3,4,5,6,7,8,9,10
4)10,9,8,7,6,5,4,3,2,1
For each of the above write down anything you notice about the list if numbers generated for each sequence write down any diffrence between each pair of terms.