Wednesday, August 5, 2015

Common Factor Puzzles

For the solution, click here.



5 comments:

  1. This is great, can't wait to try it with a class

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    1. Great! You could even have the students make their own puzzles to challenge each other. If you do, let me know, and I'll post them!

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  2. In the top right puzzle, the one that starts with a 15, could the bottom right number (4) be substituted for a 56? (Or for that matter, any number that is the product of 2, 4, and a prime?)

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    1. Yes, you're right that 56 would work - in fact any number that is a multiple of 4 but not also a multiple of 5 would work. The only issue is that there is a restriction stated in the problem that the numbers be between 1 and 20. Thanks for your input!

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    2. Wow, I totally overlooked that restriction. Thanks!

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