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

  1. I believe she's trying to keep these simple and understandable. I'm pretty sure she wouldn't have failed to recognize anything.
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  2. The problem is that we're only given the diameter of the larger semicircle. The small one is an unknown, and I could see no way of determining it.
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  3. The answer (24) is correct... Doh!
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  4. ​ @RobertCToews How? The obvious solution was 0, just from observation. And since the equation was linear, only one solution.
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  5. ​​ @Spacemonkeymojo It's basic multiplation. 0 × 5 = 0. X must be 0. Give some basic algebraic realignment, this becomes obvious.
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  6. No, it was perfect.
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  7. It is only quicker if you know the rule. I didn't. I'd prefer the quadratic formula, but I'd forgotten it. I always get the a, b, and c mixed up.
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  8. The triangle is symmetrical.
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  9. Yeah, I expected factorial to win.
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  10. ​@Bucodellozono That's ridiculous. I have Bachelors degrees in Computer Science and Mathematics... and got it wrong. Too many condescending comments from big egos under this video. This question was not easy, at least not intuatively.
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  11. It could, but I feel it looks better left in. Fewer terms that way.
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  12. I found x=8 from inspection but wasn't sure how to do the working
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  13. ​ @squatch253 Did your school not teach maths? Perhaps look online... the answers to your questions will be explaned way better there. These are important concepts to grasp before you'll be able to understand this topic.
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  14. No one cares.
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  15. ​@lychief I couldn't solve it algebraically and gave up. And I have a Bachelors degree in mathematics. Problem is, I've forgotten 99% of it.
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  16. This a place for those seeking education, not for people like you with massive egos. So, yes, the explanations are important.
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  17. It also needs all angles to be equal.
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  18. I always stumble on log stuff. Logs are so unintuitive.
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  19. Very good, but that approach feels even less intuative. I got it wrong, sadly. And even after watching the proof, I still "feel" that factorial should beat exponential, all else being equal.
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  20. You're wrong. Listen carefully next time.
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  21. For non-negative real numbers, at least.
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  22. ​ @LysanderLH Are you actually being serious?
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  23. ​​​ @davepowder4020 This example is demonstrating a mathematical principle or concept. You're probably looking at this the wrong way. Principles are applied to real world problems. Examples like these are teaching methods. They're baby steps to get people started. Calculus is used a lot in physics. A common beginner "real world" problem is to calculate the height that a ball would reach after being thrown. For this, a polynomial is usually supplied that models the path.
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  24. Yeah, there are a few variations, but all mean the same thing. The most common problem seems to be people forgetting to work left to right when there are an Ms and Ds. They wrongly follow the PEMDAS order.
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  25. ​ @ianturnbull985 Then, what is the correct value for P?
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  26. How?
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  27. You must have a super brain? Actually, I dont believe you. I've been staring at the thumbnail for 30 mins and still no clue. There is absolutely no way this can be solved in 10 seconds.
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  28. Sorry, but I don't understand any of that. I solved #4 in my head but used an entirely different approach.
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  29. This is a really tough one. I was also trying to find the "touching point", but couldn't, and I couldn't follow your reasoning either.
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  30. Would you like a Joe 90 badge in recognition of your outstoundung effort?
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  31. I have no idea what you're talking about, but yes, there are other ways to do it, and some easier.
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  32. So, in your school there were no maths lessons? This type of thing (algebra) is usually taught at age 13 or 14.
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  33. Yes, but only if the questioner asks for them.
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  34. Then there would be no point in creating this video. Just post up the answer at the 10 second mark. No. This is a teaching exercise, right?
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  35. Why?
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  36. Not all divisions are fractions of the form shown in this video problem, e.g. this trivial case... 30-(5+4)÷3+5-1= Here you need the BODMAS (or PEMDAS) rule. The same typically applies in computer programming wherein these rules are built into the language compilers and interpreters, often in a structural way, such as in a top-down parser. How do I know? I've been working on compilers as a software developer.
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