Comments by "Toby" (@toby9999) on "Math Queen" channel.

  1. ​​ @ndeleonn Well, it's very common to lose fast memory recall, etc. as we age. I'm 65. I can feel it. I'm nowhere near as sharp as I was at age 20. And it's not through inactivety. I've been a sofware developer for 28 years.
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  2. ​ @jstnxprsn We need the rules and the understanding.
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  3. Only if you're being overly pedentic.
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  4. ​ @maddevil7474 The process would be the same, but it would likely be too much to hold onto in one's head in the more complex cases.
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  5. ​ @ddichny Why would you think that? I'm still mind blown by the solution, but what I'm reading is even more extraordinary. I mean, I would never have thought that the area would be the same if the inner circle was smaller.
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  6. ​ @DarthPhilip We were not left to believe anything. Why would anyone assume a single answer regardless of the small radius? I'm shocked by this one. LOL
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  7. It's always advisable to include extra steps when teaching. A lot of this stuff is not obvious, and not only for beginners.
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  8. You're joking, right? No one can solve it in a few seconds. I'm over an hour now and still nowhere near.
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  9. Both work equally well.
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  10. By what standard is it a straight forward no brainer? Univeristy major level? It's subjective. It's just your opinion. And no one cares. But realise that this video goes out to a broad range of people, many of whom will have no math skills and right through to high level. It's a tutorial. But I'm sure you enjoyed the boasting, right?
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  11. You say no need for this step. I read a lot of comments saying that this step or that step is unnecessary or that the there is to much detail etc. This is a teaching channel. More steps is almost always better.
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  12. That's how I thought about it, but my belief that factorial should win forced me into the wrong conclusion.
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  13. Not really.
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  14. Yeah, that's easy with nice numbers. The real value in these videos is the how-to and what pitfalls to avoid.
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  15. You've missed the whole point of this channel, you and a thousand others, and it hapoens every time, jeeze. I thought this channel was for people with their thinking caps on?
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  16. I'm just looking at this problem, and my brain is already in pain 😞
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  17. I'm still struggling to visualise that
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  18. This is very basic calculus. Search online for "what is calculus used for" and be ready for a huge list.
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  19. Rubbish. This is nowhere near 7th grade. My son didn't get anything like this at high school until grade 11, and even then, it was not this difficult.
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  20. It's not easy at all. Even your clue doesn't help me. My guess is that 99! is larger because 98×99 is growing way faster than 50×50, but I'm probably wrong. I'll now watch the video.
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  21. It's always better to show full wotking otherwise folk will be left scratching their heads while trying to figure out the missing steps. This was always a problem in mathematics classes... teachers skipping steps and thereby leaving students confused.
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  22. ​ @chrisp4170 Yes. The sqrt of 36 is 6. You might be thinking of it backwards, or you might be confusing sqrt with roots of polynomials?
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  23. How would you know that? Is it common knowledge?
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  24. There will come a pont when you simply can not calculate the result that way, perhaps due to complexity, and when that happens, you'll need to fall back onto proven principles and techniques. This video demonstrates ways to appraoch a specific example in a step by step way. Yeah, a lot of people can solve it in their head, as I did, but that's missing the point.
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  25. A complex number has a real part, and an imaginary part e.g. 5+3i
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  26. They're correct for the intended purpose , and that purpose is to jog one's memory. PEMDAS is not a full set of rules. We were taught that in full detail. Luckely, I had a few excellent teachers. Studenrs are supposed to remember details such as M and D have equal precedence.
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  27. ​ @HeinrichDixon Why do you think people get it wrong? Are they poorly taught? It's a pretty simple concept.
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  28. How did you get from line 3 to line 4?
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  29. No, it was hard. Easy for you doesn't mean easy for everyone. Not everyone has a PhD
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  30. So, is that why ln is used for base e?
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  31. Nope.
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  32. There is no easy way. None of the problems on this channel are easy. I've tried a heap of them and I managed to solve one only. I spent 30 minutes trying a bunch of things for this one and failed. The solutions in the comments are no help either. A of assumptions mainly. I wanted to solve it myself before watching the video 😞 Why do people keep talking about "easy". Ridiculous!!!
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  33. ​ @illwerral I took the algabraic route and just hit dead ends.
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  34. ​@cdunne1620Why do you treat people so rudely? Just explain it instead of calling people ignorant. We're all here to learn, right?This puzzle is not easy.
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  35. ​​ @robertmorrison1100 I tried something similar to that but hit a dead end.
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  36. ​ @thomasstanton1111 No it doesn't. I've spent an hour on this by now. Still haven't watched the video solution yet, but I'm no closer even after skimming through this thread.
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  37. I'm guessing for clarity. Not everyone would notice that.
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  38. I tried that and failed. I failed to see how the diameter relates to the side length while visualising it.
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  39. That's spectacular
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  40. Why is that relevent? I don't understand the significsnce of those means
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  41. Stop lying. There is no way it's that easy. Even my mathematics degree knowledge from a few decades ago hasn't helped. There is insufficient information to calculate the proportion due to the red area.
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  42. I find that exraordinary... you solved the area of a circle without know the radius. I still don't see how that can work, even with the stick? At least not concepually.
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  43. Yeah, riiiiight.
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  44. ​ @Chiswick-Edward Why not d? It's less than 1, isn't it?
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  45. I'm pretty sure she knows that
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  46. ​@jameslechner4233 Why would it? There's a whole lot of things not making any sense with this puzzle.
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  47. Big deal. I guess you enjoy boasting? Spare a thought for those of us who want to learn.
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  48. Moving sides and changing signs is equivalent to adding or subtracting from both sides. You've just skipped the step in your head. What you did is quicker but it's easier to make a mistake that way.
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  49. Wow, I would never have thought of that. I tend to think of logs as mysterious values with no intuitive interpretation.
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  50.  @johnpaullogan1365  Why should they easily recognize that? Who says they should? The quadratic formula is easier because it's one thing to remember, rather than a whole bunch of rules where mistakes can be easily made. I can never remember any of the quadratic factoring rules.
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