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Sandy Wood
Brain Game: Math Square #3
by Sandy Wood - November 5, 2009 - 7:30 AM

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Readers requested a more difficult Math Square challenge, so we reduced the “free” numbers in this puzzle from two to only one. Let’s see if this one fits the bill for today’s Brain Game!

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 5) 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-03-q

Here is the SOLUTION.

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Comments (9)

  1. I got it.

    That ‘50′ threw me off a little, but I finally got it.

    posted by MikeTrig on 11-5-2009 at 7:40 am

  2. I forgot about the 1-9 rule, so I got it right away….then i actually read the rules. It took a little more time but got it as well.

    posted by Kevin on 11-5-2009 at 8:53 am

  3. Great tie-in to your new Please Excuse My Dear Aunt Sally shirt! Forgetting that is what tripped me up at first, but I got it once I remembered. Great puzzle, Sandy!

    posted by oops on 11-5-2009 at 8:57 am

  4. At first it looks tough, but remembering to use the algebraic rules made getting the top row easier.

    posted by mathesond on 11-5-2009 at 9:24 am

  5. Top row was a little tough even when I knew to use the algebraic rules. Once I got the top, the rest of the square was easy. Good Puzzle!

    posted by David on 11-5-2009 at 11:06 am

  6. 867523914

    posted by Cameron on 11-5-2009 at 11:53 am

  7. Yeah this was tougher than the others, but you’re right about that top row. I kept trying to divide the middle column by 1 but eventually I narrowed the center square to 2 and it all came together.

    posted by WallabyJoe on 11-5-2009 at 1:43 pm

  8. I love these, keep ‘em coming. Thanks!

    posted by JetaN on 11-5-2009 at 7:07 pm

  9. This was a fun little puzzle. Keep the fun coming, Sandy!

    posted by Brett on 11-5-2009 at 8:08 pm

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