## A Multiplication Based Logic Puzzle

### 47 and Understanding the Equal Sign with Candy

Understanding the equal sign with Candy. 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.

• 47 is a prime number.
• Prime factorization: 47 is prime.
• The exponent of prime number 47 is 1. Adding 1 to that exponent we get (1 + 1) = 2. Therefore 47 has exactly 2 factors.
• Factors of 47: 1, 47
• Factor pairs: 47 = 1 x 47
• 47 has no square factors that allow its square root to be simplified. √47 ≈ 6.85565

How do we know that 47 is a prime number? If 47 were not a prime number, then it would be divisible by at least one prime number less than or equal to √47 ≈ 6.9. Since 47 cannot be divided evenly by 2, 3, or 5, we know that 47 is a prime number.

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

Please note: THE LINK BELOW NO LONGER WORKS. It has been moved to

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!

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