A Multiplication Based Logic Puzzle

47 is a prime number. 47 = 1 x 47. Its only factors are 1 and 47. Prime factorization: none.

How do we know that 47 is a prime number? The square root of 47 is an irrational number approximately equal to 6.86. If 47 were not a prime number, then it would be divisible by at least one prime number less than or equal to 6.86. Since 47 is not divisible by 2, 3, or 5, it is a prime number.

47 is never a clue in the FIND THE FACTORS puzzles.

What a wonderful lesson! Teachers or parents can easily follow Jen’s lesson plan. I’m certain children will always remember what an equal sign means forever after. (It will be necessary to click twice to get to the lesson.)

Beyond Traditional Math

I am so thrilled to be guest posting today over at Minds in Bloom, Rachel Lynette’s awesome blog! In the post I talk about how I noticed a misconception that my students had about the equal sign.  I decided to use candy to help my students understand what the equal sign *really* means.

Click the image below to read on!

Screen Shot 2014-01-18 at 9.11.13 PM

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