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Sandy Wood
Brain Game: Math Square #2
by Sandy Wood - October 29, 2009 - 7:30 AM

THE SOLUTION:

solution

Pages: 1 2
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Comments (15)

  1. I like these, I think this one was easier than the last one though!

    posted by Patrick on 10-29-2009 at 8:24 am

  2. Something about numbers. So reliable. So consistant. Love these puzzles.
    Keep them coming. Great job on these Sandy.

    posted by KevinGA on 10-29-2009 at 8:38 am

  3. I got it before 8am. Yay. I do like these. Challenging, but not impossible.

    CAPTCHA: lizard yourself

    posted by Nick on 10-29-2009 at 8:52 am

  4. This works, too:

    9 x 4 – 24 = 12
    - + x
    2 x 7 + 2 = 16
    + – /
    5 + 7 – 4 = 8
    = = =
    12 3 12

    posted by BJ on 10-29-2009 at 9:12 am

  5. I like these puzzles. They aren’t hard, but they really get your mind working.

    posted by Bill on 10-29-2009 at 9:16 am

  6. In response to BJ’s alternative solution, are you allowed to have multiples of numbers? I was under the impression that you could only have one of each number between 1 and 9, but the directions aren’t completely clear on that.

    posted by Rita on 10-29-2009 at 9:29 am

  7. More, please!

    posted by Nora on 10-29-2009 at 9:47 am

  8. I don’t think BJ’s works. The middle column down would be 4+7-7=3.

    posted by jj on 10-29-2009 at 9:52 am

  9. BJ, your response isn’t right even with your numbers. your middle column down reads 4+7-7=3.

    posted by Thomas on 10-29-2009 at 9:53 am

  10. I don’t think BJ’s solution works. The middle column down would be: 4+7-7=3

    posted by jj on 10-29-2009 at 9:55 am

  11. Rita, you’re correct – each digit from 1 to 9 can only appear once in the middle part of the puzzle. I’ll revisit the instructions to see if there’s a way to make that clearer.

    UPDATE: I added an extra line in the instructions to ensure readers know that each digit 1 through 9 appears only once in the main grid. Thanks for the suggestion!

    posted by Sandy Wood on 10-29-2009 at 10:05 am

  12. Thanks for the kind comments, everyone. Looks like we’ll have to make this a once-a-week addition to the expanding mix of puzzles.

    posted by Sandy Wood on 10-29-2009 at 10:10 am

  13. love these! this one was a bit easier than the last, but still fun

    posted by Ian from Baltimore on 10-29-2009 at 11:09 am

  14. Er, BJ, in what way do you consider yours a viable solution? First, 24 is not a legal number. Second, several of your rows and columns do not, in fact, total up to the right numbers.

    posted by Lugh on 10-29-2009 at 12:33 pm

  15. As a math dunderhead, I usually prefer word puzzles. But these are just perfect for me – easily solvable, but requiring a little bit of calculation. Good job!

    posted by Kelly on 10-29-2009 at 3:10 pm

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