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6 July, 06:02

Choose a number and add 5 to it. Multiply it by 2. Subtract by 7 and add 1. Divide by 2. Subtract 2. Will you get your starting number every time?

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  1. 6 July, 07:29
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    8+5=13

    13*2=26

    26-7=19

    19+1=20

    20/2=10

    10-2=8

    100+5=105

    105*2=210

    210-7=203

    203+1=204

    204/2=102

    102-2=100

    4256+5=4261

    4261*2=8522

    8522-7=8515

    8515+1=8516

    8516/2=4258

    4258-2=4256

    Yes, I tested it 3 times with 3 different numbers.
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