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
The two numbers that add up to -3 and multiply to -28 are -7 and 4. This is because -7 + 4 equals -3, and -7 × 4 equals -28.
21
3
103, 7, 3
7
61, 7, 2
-23
The consecutive numbers that add up to eight are 3 and 4. When you add these two numbers together (3 + 4), the sum is 7. However, there are no two consecutive whole numbers that sum to 8. The closest consecutive whole numbers are 4 and 5, which add up to 9.
30
10
1+6 2+5 3+4
19 + 31 + 7 = 57