9
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Insert multiplication and division operators and parentheses into the following sequence to make the equation true.

Note that you can combine digits to form numbers, such as 1 and 2 to make 12, or 4 and 5 to make 45, but you can't alter the order of the sequence.

1 2 3 4 5 6 7 8 9 = 1

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  • 6
    $\begingroup$ Doesn't seem to be a duplicate - this requires only multiplication and division, the other allowed any operators. Note that it's super easy with +/- : 1-2+3+4-5-6+7+8-9 = 1 $\endgroup$ – jhabbott Feb 12 '16 at 23:17
14
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$$12 \times (3/4)/56 \times 7 \times 8/9 = 1$$

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-1
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1+(2-3)-(4-5)+(6-7)-(8-9)=1

So, how did I misinterpret the puzzle?

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  • 2
    $\begingroup$ It asked for multiplication and division, not addition and subtraction. $\endgroup$ – f'' Feb 14 '16 at 2:34
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    $\begingroup$ Man am I stupid for not really reading that. My mind just read multiplication and division, and just assumed addition and subtraction were ok too. $\endgroup$ – Larry Troxler Feb 14 '16 at 3:23

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