How many whole numbers have a sum of 99

With the sum of 99, we will get 50 pairs whole numbers. Why?
Let’s start with
0+ 99
1 + 98
2 + 97
3 + 96
4 + 95
5 + 94
6 + 93
7 + 92
8 + 91
9 + 90
10 + 89
………
……..
43 + 49
44 + 50

Therefore, if you’re going to count all pairs of the whole number, you will get 50 pairs of the whole number with the sum of 99.

The full question isn’t shown. part of it is cut off