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7 February, 13:46

What is the rule for 4,7,13,25,49,97

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Answers (2)
  1. 7 February, 13:50
    0
    The rule is x2 - 1 (times two minus one)
  2. 7 February, 14:01
    0
    4 - 1 = 3

    4 + 3 = 7

    7 - 1 = 6

    7 + 6 = 13

    13 - 1 = 12

    13 + 12 = 25

    25 - 1 = 24

    25 + 24 = 49

    49 - 1 = 48

    49 + 48 = 97
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