My Math Forum Can someone explain what this means? thanks in advance

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 February 28th, 2017, 05:56 AM #11 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038 Pretty sure it's a 2, Skip; larger version here: Percent of all people just don't understand math I think it's a bit like a rebus puzzle...
February 28th, 2017, 06:36 AM   #12
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 Originally Posted by b19 How did you get 78% I have been given this question in math to know what it means and have to explain it.

February 28th, 2017, 04:09 PM   #13
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 Originally Posted by Denis Pretty sure it's a 2, Skip; larger version here: Percent of all people just don't understand math I think it's a bit like a rebus puzzle...
A 2? Come now Denis, it's clearly a 3!

February 28th, 2017, 06:57 PM   #14
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Well no kidding? Isn't that what this website is for, so others can get help?

February 28th, 2017, 07:02 PM   #15
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 Originally Posted by b19 Well no kidding? Isn't that what this website is for, so others can get help?
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 Originally Posted by skipjack I think the expression inside the cube root is as shown below: $$\dfrac{-\left(\displaystyle \sum_{n = 1}^{15}e^{\large\ln n}\right)\Bigg({\Large5!}\Bigg) {\Bigg(}{\Large7}^{{\Large\ln}_{ \large7}\large120}{\Bigg)}}{\displaystyle \left(\lim_{x \to 0}\frac{\sin x}{x}\right){\bigg(}i^{\large4}{\bigg)} \left(\cos \frac{3\pi}{4}\right) \left(\frac{2}{\sqrt2}\right)}$$ which would make the original expression evaluate to 120%. (The expression uses $\log_7$, but that means the same as the $\ln_7$ given above.) However, the $\sqrt2$ is hard to read and might be $\sqrt3$.
It's a 2, and thank you! So you just did them all separate and came up with that percent? I don't understand why that would be the answer to the joke?

February 28th, 2017, 07:30 PM   #16
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 Originally Posted by b19 It's a 2, and thank you! So you just did them all separate and came up with that percent? I don't understand why that would be the answer to the joke?
The joke is just supposed to be "(some percentage) of people don't understand math". And the "(some percentage)" part is intended to be some expression that those who aren't familiar with math, find hard to understand. As to what that percentage actually is, I think is beside the point...

Last edited by skipjack; February 28th, 2017 at 11:27 PM.

February 28th, 2017, 07:45 PM   #17
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 Originally Posted by b19 Isn't that what this website is for, so others can get help?
YES....help with maths.

 February 28th, 2017, 11:32 PM #18 Global Moderator   Joined: Dec 2006 Posts: 20,835 Thanks: 2162 As -(120)(120)(120)/((1)(1)(-1/√2)(2/√2)) = 120³, the original expression evaluates to 120%.

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