The term in the below sequence increases by the same amount each time. Find the first term.
| 1st Term | 2nd Term | 3rd Term | 4th Term | 5th Term |
| ? | 12 | ? | ? | 27 |
1
5
2
17
3
7
4
20
The term in the below sequence increases by the same amount each time. Find the first term.
| 1st Term | 2nd Term | 3rd Term | 4th Term | 5th Term |
| ? | 12 | ? | ? | 27 |