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Fun calendar probability problem
I picked up a little gem from Math Wonders to Inspire Teachers and Students, by Alfred Posamentier. The book, by the way, is outstanding. Posamentier has become one of my heroes for writing books that...
View ArticleProbability and divisibility by 30
Well, probability is on my mind - this sounds like a great song title, no? I've got another probability problem, this one presented to me by my brother Abe as I called him from the airport half way to...
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Monday Math Madness: We have a winner!
For the very first Monday Math Madness contest we got 13 submissions. Of the 13, 6 were correct. For the record, I solved the problem by enumerating the various cases where 3 categories were...
View ArticleA very clever way to solve the first Monday Math Madness problem
On March 3rd Blinkdagger and I posted the first Monday Math Madness problem. On March 11th, after the first contest ended, I posted a couple of different solutions to the problem. Pat Ballew, even...
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Monday Math Madness #9
Last Friday Blinkdagger announced a winner for MMM #8. Here's MMM #9: Consider all of the 6-digit numbers that one can construct using each of the digits between 1 and 6 inclusively exactly one time...
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MMM #25: Monotonous Monday Math Madness
[ See below for MMM #25 ] Blinkdagger has announced the winner for MMM #24 and I've got a new problem so keep reading. Rich Berlin noticed the relationship to MMM #1 and submitted an interesting...
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