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epi

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Everything posted by epi

  1. I assume the results will be given at the end of the round 1 time window. I believe this competition is new, so we can't look back at any "what they usually do".
  2. We've found that schools are quite disorganized when we try to find a place for a homeschooler to take a test. An unrelated AMC8 question: Are the AMC8s from >10 years ago known to be somewhat easier than the modern ones?
  3. She can register as grade 1 this time, and again next time.
  4. I know, but it's very inconvenient. With the testing centers being so few and far between, it's always been much more convenient be able to go straight to the "centers" page http://www.mathkangaroo.org/mk/centers.html to quickly see if anything remotely close has been added.
  5. FWIW we "splurged" the $2.99 for the practice materials. It was US$2.99, but the questions have Australian/English spelling (e.g. colour, litre etc), so there's the international aspect.
  6. They still don't have their list of centers online. http://www.mathkangaroo.org/mk/centers.html
  7. We'll wait until December, to minimize driving distance.
  8. I guess it's open to anyone anywhere. Just use US grade.
  9. I agree. Just use the grade they are in, or would be in, in school, based on age. They compete against their age/grade peers, even if they are accelerated in math. Plenty of other contestants are accelerated too. (I'm sure you can do a higher grade if you want.) I've never seen this contest before, so I don't know the difficulty level, but I assume there'll be be some tougher questions to separate out the top contestants. Anyway, we're enrolling in grade based on age, and telling DS it's low stakes, just have fun, but avoid careless mistakes.
  10. Everyone is focusing on the work-ethic issue, which is important. Lack of effort is a concern. But that's not what this describes: That's self-sabotage. I would be a hundred times more worried about anything deliberately self-destructive than I would be about mere laziness.
  11. I got an email about this contest https://edfinity.com/competitions?c=100 I don't know anything about it, but it looks like a good, fun contest.
  12. MATH IS LOUD! :) || || V || || V || || V || || V The opposite of the opposite of the opposite of easy is loud! :rolleyes:
  13. (Additive) Abelian Group Axioms https://proofwiki.org/wiki/Definition:Abelian_Group_Axioms Subtraction is defined by x-y:=x+(-y) for every x,y And the axioms imply -(-z)=z for every z So it must be that a-(-b)=a+(-(-b))=a+b for every a,b "Subtracting the negative of a number is the same as adding that number." Note that "negative numbers" (numbers x satisfying x<0) are not really relevant here because an Additive Abelian Group need not even be equipped with an inequality "<". Instead, what is being used is the negative -b of a number b.
  14. I think it's just one possible solution technique, and not essential for the topic. Sometimes the solution writer could be a different person to the question writer, and they might not have the same solution idea in mind. Also the solution writer might not have a precise idea of what the student is "supposed to know". Anyway, it's worthwhile knowing polynomial long division, and if you google it you quickly see many links, and the able student can get it. By the way, if you happen to be dividing polynomial p(x) by linear function x-a (here x is the variable, and a is the constant), then the remainder is simply p(a), i.e. plug in a for x in p(x) to get the remainder!
  15. Wow, there's so much practice and training for math competitions these days. When I was a kid, being prepared was mostly just knowing the time and place, so you could show up and take it.
  16. The statistics page for 2016 has appeared. http://www.mathkangaroo.org/mk/statistics.html
  17. Not sure if these fit but here are some "list threads" I had bookmarked. http://forums.welltrainedmind.com/topic/518534-list-of-popular-curricula-for-k-8/ http://forums.welltrainedmind.com/topic/542418-homeschool-high-school-math/ http://forums.welltrainedmind.com/topic/553685-freebie-list-for-friend/ http://forums.welltrainedmind.com/topic/560131-free-curriculum/
  18. DS10 was on the AoPS website and noticed they had some Python programming classes. (He's taking AoPS math classes) I know nothing about Python. I have only done programming in school courses many years ago using mainly Pascal, so I don't know these newer programming languages from more recent decades. Also I hadn't really thought about programming as a homeschool topic, until DS10 mentioned this Python class. He wasn't asking to take these classes (or any class) specifically. It was more a conversation starter about how he could learn about this topic. Anyway, I thought it was a topic you could start on by "just playing around with it", and I'd heard of Scratch scratch.mit.edu so he made an account and has been playing around with it. I haven't really looked at what he's done yet, as in are the programs he makes just lists of instructions, or are there loops and if-thens etc, but I like the idea of just learning the general principles of programming, rather than any specific language (especially since I have no idea what programming languages are even used these days). So Scratch seems like a good starting point, right? But any suggestions for how to proceed with other ways to learn about computing, in a homeschool environment, for a very mathy kid, with mathy parents who understand general theoretical computing and programming principles, but lack modern practical computing knowledge?
  19. Update: DS10 has now started to take a couple of classes, and it's working out really well. He really just needed that extra structure to stay on task (and he finds the live classes fun). So we may keep doing the classes in the future. Or we may figure out how to provide the structure at home (which, as parents, we had previously failed to do).
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