Pls what is the rule

1. Rule: +5
Explanation: 2 + 5 = 7
7 + 5 = 12
12 + 5 = 17
and so on...
2. Rule: + odd numbers (3,5,7,9)
Explanation: 0 + 3 = 3
3 + 5 = 8
8 + 7 = 15
3. Rule: + odd numbers (3,5,7,9)
Explanation: 1 + 3 = 4
4 + 5 = 9
9 + 7 = 16
and so on...
4. Rule: + 3
Explanation: 6 + 3 = 9
9 + 3 = 12
12 + 3 = 15
5. Rule: + odd numbers (3,5,7,9)
Explanation: 3 + 3 = 6
6 + 5 = 11
11 + 7 = 18
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