Find the missing number in counting

Look at the numbers on each side of the box. Which number fits between them?

1. Kai says: What number is missing? 3, □, 5
2. Fay says: What number is missing? 6, □, 8
3. Lia says: What number is missing? 2, □, 4
4. Nia thinks: What number is missing? 3, □, 5
5. Ben asks: What number is missing? 8, □, 10
6. Kai asks: What number is missing? 10, □, 12
7. Pia thinks: What number is missing? 5, □, 7
8. Kai thinks: What number is missing? 14, □, 16
9. Dara asks: What number is missing? 30, □, 32
10. Fay thinks: What number is missing? 16, □, 18
11. Gus wonders: What number is missing? 19, □, 21
12. Jon wonders: What number is missing? 32, □, 34
13. Gus asks: What number is missing? 45, □, 47
14. Lia asks: What number is missing? 86, □, 88
15. Omar asks: What number is missing? 94, □, 96
16. Hana thinks: What number is missing? 20, □, 22
17. Omar says: What number is missing? 80, □, 82
18. Chen asks: What number is missing? 91, □, 93
19. Gus thinks: What number is missing? 45, □, 47
20. Dara thinks: What number is missing? 84, □, 86