Tatiiii3413 Tatiiii3413

21-09-2018
Mathematics

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

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amberlouise2 amberlouise2

21-09-2018

1 + 39
2 + 38
3 + 37
4 + 36
5 + 35
6 + 34
7 + 33
8 + 32
9 + 31
10 + 30
11 + 29
12 + 28
13 + 27
14 + 26
15 + 25
16 + 24
17 + 23
18 + 22
19 + 21
20 + 20

Then it would start repeating itself the other way round, so the answer is 20 pairs

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