10
3
1+6 2+5 3+4
The three pairs of numbers that each add up to 7 are (1, 6), (2, 5), and (3, 4). In each pair, when you add the two numbers together, the result is 7. These pairs are examples of complementary numbers that combine to equal a specific sum, in this case, 7.
-1
27
21
3
-23
7
61, 7, 2
103, 7, 3
30
10
1+6 2+5 3+4
19 + 31 + 7 = 57
23 + 3 + 3 5 + 7 + 17
2 3 13