The final score was 4 – 2.
A possible half time score could have been 2-1 (which is half of the final score).
Possible half time scores are 0,1,2,3,4 and 0,1,2. Writing these in a list means we will not miss any.
Possible answers:
0-0
1-0
2-0
3-0
4-0
0-1
1-1
2-1 (which is halfway in this list!)
3-1
4-1
0-2
1-2
2-2
3-2
4-2
There are 15 possible scores in 4 – 2.
The final score was 3 – 3.
Possible half time scores are 0,1,2,3 for one team and 0,1,2,3 for the other.
0-0
1-0
2-0
3-0
0-1
1-1
2-1
3-1
0-2
1-2
2-2
3-2
0-3
1-3
2-3
3-3
There are 16 possible scores.
There are 4 possible scores at half time for each team, and 4 x 4 is 16.
This works for the first match as well, the score was 4-2 so the half time possible scores are 0,1,2,3,4 and 0,1,2 which is 5 x 3 which is 15.