How many pairs of whole numbers numbers have a sum of 40

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asked Jul 1, 2018 8.2k views

1 Answer

Anders Swanson · Answer 1 · 2018-07-05T01:43:49+0000

there are 20
1. 1 + 39 = 40
2. 2 + 38 = 40
3. 3 + 37 = 40
4. 4 + 36 = 40
5. 5 + 35 = 40
6. 6 + 34 = 40
7. 7 + 33 = 40
8. 8 + 32 = 40
9. 9 + 31 = 40
and the list goes on and on

How many pairs of whole numbers numbers have a sum of 40

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