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15 December, 03:52

15 unknown 11 unknown 3 unknown = 7 find the sign

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  1. 15 December, 03:59
    0
    I tested different options and I got:

    15 - 11 + 3.

    If they all have to be the same sign, that's impossible

    Addition doesn't work.

    Subtraction doesn't work.

    Division doesn't work

    Multiplying doesn't work

    Exponents don't work.

    So I'm assuming they have to be different signs.
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