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Feb 21, 2023
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James Kidd Smyth's avatar

That reminded me of https://en.wikipedia.org/wiki/Missing_dollar_riddle

Note, for that one to work, you really have to deliver it in the right way. And, Holly, it occurs to me (but this is _NOT_ my area of expertise) that a hearing imparied individual actually might be less prone to the nature of the delivery having an effect on the working of the puzzle.

Note 2, I thought briefly about just posting the link and seeing if merely reading the puzzle has the same effect as hearing it. But that seemed overly surreptitious.

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nkcunningham's avatar

My old math teachers would be proud, I saw the math problem and before scrolling down managed to figure it out and get the correct answer before I continued reading, guess I remember more of those old algebra lessons then I thought

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Daniel Owen Lynch's avatar

Good explanation, but also kinda sad that anyone who's gotten past algebra I might have trouble solving it.

Years ago when my youngest son was in 2nd or 3rd grade, he came down with strep throat. Having plenty of time to burn, I took the days off to stay with him. His sister brought home his homework assignments, part of which was math.

So I'm sitting there looking at what the assignment is, thinking to myself "how do you solve this without using algebra?". Coming up with nothing else and not knowing what had been taught in class, I taught my 7 or 8 year old son simple algebra - how to handle simple arithmetic, cross over the bridge and change the sign and all that. He had it figured out in about 30 minutes. Could he have solved THIS word problem? Probably not. But he was 7 or 8, not 14 or 15.

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Jeff G's avatar

“If we cut this pie into four pieces but don’t eat any, we still have one whole pie. Why? Because we have four fourths: 4/4”

My god, you love to court controversy, don’t you?

It’s obvious that since 2 + 2 = 5, if you add 2 fourths + 2 fourths, you have 5 fourths, which is to say, more pie than you started with.

Then divide each of the now 5 fourths into 4 and voilà, 2 + 2 subslices = 5. Etc.

So the universe gave you a pie. And you could have solved world hunger. But you retreated to your hidebound ways! 🤦‍♂️

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Holly MathNerd's avatar

LMAO, you had me in the first half. I was going "Jesus, what the fuck....." ha ha ha ha

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Jeff G's avatar

😜

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Jeff G's avatar

Also tbh I’ve been meaning to get you with a 2+2=5 joke for some time 😍

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Peter Dawson's avatar

Beautifully presented Holly - I wish some of my ex students could have written with such clarity - if I was still teaching I would have given them all a copy of this - especially the boys.

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Jen X's avatar

You do have a gift for explaining. I remember sitting in math class in 7th or 8th grade saying “I’m going to be an artist, I’m never going to need math.” And guess what, I use math every single day of my professional-artist life. 😜

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Sam's avatar

Thank goodness I got this right, and got it right quickly lol. The day it isn't quick and easy is going to be a sad and scary day. Especially since math/calc was always my strongest subject and buoyed my GPA. I got 88 or 89 once or twice but most of the time it was at least 95. Also I'm proud that I short-cutted a couple steps. I started with 30 + (1/8)x = (3/4)x The only thing I'm not proud of is that I did 240/5 on paper and not in my head lol.

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