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Sandy Wood
Brain Game: Math Square #4
by Sandy Wood - November 17, 2009 - 7:30 AM

bloghead_braingames.jpg

The nine squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in the mail grid. One of these numbers (the 2) is already provided for you. Place the other digits in the correct spots so that the mathematical equations work both across and down. Remember your algebraic rules when solving the problems… multiplication and division should be solved first, then addition and subtraction. Good luck!

mathsq-04-q

Here is the SOLUTION.

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Comments (14)

  1. Too easy drill Sergeant!

    posted by garrett on 11-17-2009 at 9:14 am

  2. i love the math squares! thanks

    posted by jen on 11-17-2009 at 9:58 am

  3. BAM! Great way to start the week (being of on mondays, its the first day of the week for me)

    posted by Ian from Baltimore on 11-17-2009 at 10:27 am

  4. found another solution…

    7×2+4 = 18
    +_+_+
    6-9+3 = 0
    -_x_-
    8+5×1 = 13

    = = =
    5 47 6

    posted by brian on 11-17-2009 at 10:47 am

  5. oops that was your solution, i meant…

    7×2+4 = 18
    +_+_+
    2-5+3 = 0
    -_x_-
    4+9-1 = 13

    = = =
    5 47 6

    posted by brian on 11-17-2009 at 10:55 am

  6. @Brian, you can only use 2 and 4 once, so your second solution can’t work.

    posted by Tim on 11-17-2009 at 11:11 am

  7. Took me a bit, but I got it. I like these. I kept doing the addition and subtraction before the multiplication despite your obvious instructions. The 47 and the 18 narrowed down the options pretty quick.

    RECAPTCHA: Thursday cubist

    posted by Nick on 11-17-2009 at 11:23 am

  8. @brian: And 4+9-1=12, not 13.

    posted by wreck on 11-17-2009 at 12:03 pm

  9. 2+9×5=55, not 47

    posted by jason on 11-17-2009 at 12:09 pm

  10. Jason – you have to followed BEDMAS 2+9×5 is 47 because you do the muliplication first and then the addition. 5×9 = 45+2 = 47

    posted by darek on 11-17-2009 at 12:38 pm

  11. good catches guys…dont know why i enjoy these so much but keep em coming!

    posted by brian on 11-17-2009 at 4:34 pm

  12. BOO YA! Love these

    posted by JetaN on 11-17-2009 at 5:02 pm

  13. Second guess worked. I also threw out a BOO YA! when I got it.

    recaptcha has been discredited (is vapid)

    posted by RIchard Y on 11-17-2009 at 5:39 pm

  14. I love these, too. Just, please, next time check to make sure you don’t have any primes. Thanks, keep them coming!

    posted by Emily S. S. on 11-17-2009 at 8:37 pm

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