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Counting in 2s

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  • 1, 3, 5, 7, 9, 11, ?, ?
    13, 15
  • 2, 4, 6, 8, 10, ?, ?
    12, 14
  • 12, ? ? 18, 20, ?
    14, 16, 22
  • 60, ?, 64, ?, 68, ?
    62, 66, 70
  • 14, ? ? 20, 22, ?
    16, 18, 24
  • 2, ?, 6, ?, 10, ?
    4, 8, 12
  • 4, 6, 8, 10, 12, ?, ?
    14, 16
  • ?, 26, ?, 30. ?, 34
    24, 28, 32
  • 2, 4, ?, 8, ? 12, 14
    6, 10
  • 40, ?, 36, ?, 32, ?
    38, 34, 30
  • 38, ?, 42, ?, 46, ?
    40, 44, 48
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