There are at least 20 pairs of whole numbers that are equal to the sum of 40. I will list them for you~
1+39=40
2+38= 40
3+37=40
4+36= 40
5+35=40
6+34=40
7+33=40
8+32=40
9+31= 40
10+30=40
11+29=40
12+28=40
13+27= 40
14+26=40
15+25=40
16+ 24= 40
17+23= 40
8+ 22= 40
19+21=40
20+20= 40
Here you go, hoped this has helped in any sort of way~
