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27 January, 22:10

4,13,31,67 ___

What's the rule?

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Answers (2)
  1. 28 January, 01:19
    0
    The rule is every number x2 plus 5
  2. 28 January, 01:54
    0
    The rule is x times 2 plus 5

    So 4 times 2 plus 5 is 13 and so on
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