Sample Before, After, In Between

1. Which number comes before?
24    25
2. Which number comes before?
71    72
3. Which number comes after?
78    79   
4. Which number comes after?
64    65   
5. Which number comes in between?
34 36
6. Which number comes in between?
37 39
7. Which number comes before?
Answer : 42    43
8. Which number comes after?
29    30   
9. Which number comes after?
86    87   
10. Which number comes in between?
84 86