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PLAYFUL MATH BLOG CARNIVAL #163
BLOG CARNIVAL #163....LET'S GO! Fun fact: The number 163 is prime, which we can prove simply by showing that it is not divisible by 2, 3...
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The scales below are balanced. Each scale is a different puzzle. For each scale, start by taking off as many blocks as you can from each si... -
To a topologist, two shapes are "the same" if one can be stretched, twisted, and distorted into the other shape without b...
This is great, can't wait to try it with a class
ReplyDeleteGreat! 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!
DeleteIn 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?)
ReplyDeleteYes, 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!
DeleteWow, I totally overlooked that restriction. Thanks!
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