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4 August, 10:20

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

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Answers (1)
  1. 4 August, 10:33
    0
    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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