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7 June, 12:22

Start at 3. Create a pattern that multiplies each number by 2 and then adds 1. Stop when you have five numbers.

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  1. 7 June, 13:47
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    3, 3*2+1, 7*2+1, 15*2+1, 31*2+1

    3, 7, 15, 31, 63

    You are adding a multiple of four
  2. 7 June, 14:30
    0
    3, 3*2+1, 7*2+1, 15*2+1, 31*2+1

    3,7,15,31,63
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