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Zach Wissner-Gross @xaqwg

Math VP @Amplify. Co-Founder @SchoolYourself. Former Puzzle Editor @FiveThirtyEight. Opinions my own. he/him thefiddler.substack.com Roslyn, NY Joined July 2011
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Zach Wissner-Gross retweeted
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Zack Weir @weirzack1

19 hours ago

@GiraffeNeckMarc Well this was very ,very difficult C: Zack Taylor 1B: Zeke Bonura 2B: Zach McKinstry 3B: Zolio Versalles SS: Zach Sorensen LF: Zack Wheat CF: Zeke Wrigley RF: Zaza Harvey DH: Zeb Terry SP: Zack Greinke

Zach Wissner-Gross retweeted
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Jason Weisman @jason_weisman

a day ago

#ThisWeeksFiddler @xaqwg A has x, B win %= (1-x)+x(1-x)=1-x^2. A %= x^2. A indiff point=k. Integral [(x+k)^2, {x, 0, 1-k}]=1/3 (1 - k^3) 1/3 (1-k^3) = k^2 ->k≈0.53209 A win % < k = Integral[(x+y)^2, {x, 0, k}, {y, 0, 1 - x}]= 1/12 k (4 - k^3) 1/3(1-k^3)+1/12 k(4 - k^3) ~ 45.38%

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Zach Wissner-Gross @xaqwg

2 days ago

I’m a Mets fan, but this sounds like a bummer.

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Zach Wissner-Gross @xaqwg

7 days ago

Strands #52 “This is a puzzle” 🔵🔵🔵🔵 🟡🔵 This is basically my mental thesaurus for referring to puzzles for #TheFiddler.

Zach Wissner-Gross retweeted
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MAA @maanow

a week ago

Congratulations to Angela Liu, Kristie Sue, Jessica Wan, and Hannah Fox for bringing home the gold! The USA Team earned first place in the 13th European Girls’ Mathematical Olympiad (EGMO), and each student also earned a gold medal for their individual performances. #TeamUSA 🥳

Zach Wissner-Gross retweeted
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joshsilverman @_joshsilverman

a week ago

in #thisweeksfiddler we put two decks in a pile, then players draw cards for a while, if no card has a twin, both players win, and everyone leaves with a smile. at infinity, it's simpler to see that the chance is 1 over root e. joshmaxsilverman.github.io/2024-04-21-coo… @xaqwg

Zach Wissner-Gross retweeted
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Emilie Mitchell @emiliemitchades

2 weeks ago

#ThisWeeksFiddler: no proofs, just vibes 🟠2 ellipses: semiaxes 2/3 and (2/3)√3, sharing a semiminor axis bisected by the circle's center 🟢3 ellipses: semiaxes 1/2 and (1/2)√3, major axes making an equilateral triangle inscribed in the circle, minor axes as circle radii

Zach Wissner-Gross retweeted
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Jason Weisman @jason_weisman

2 weeks ago

#ThisWeeksFiddler @xaqwg Two ellipse eclipse: A-2 = 4 pi/(3*sqrt(3)) Three ellipse eclipse: A-3 = pi *sqrt(3)/4 N>3 ellipse eclipse: A-N = 2 pi/(3*sqrt(3))*sin(2*pi/N) docs.google.com/spreadsheets/d…

Zach Wissner-Gross retweeted
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joshsilverman @_joshsilverman

3 weeks ago

observing a few details about how new tiles attach, the growth of two-row clusters can be analyzed one domino at a time and yields the factor described in the tweets above. wrote up the argument and calculation: github.com/joshmaxsilverm… @xaqwg

Zach Wissner-Gross retweeted
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Tom Keith @tom_keith1

3 weeks ago

Extending #ThisWeeksFiddler by @xaqwg, I wonder what the average cluster size is in an infinite grid of random bits? Empirically, I found the answer is around 7.6023 squares.

Zach Wissner-Gross retweeted
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Coincidence @CoincidenceTeam

4 weeks ago

We made a new game! The catch is that it's a math game for elementary school students. We built it for a client, but managed to also release it on Steam so that more people can play it. Introducing... ADD ASTRA! store.steampowered.com/app/2870750

Zach Wissner-Gross retweeted
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Lowell Vaughn @lvaughn

4 weeks ago

#ThisWeeksFiddler @xaqwg Fun pattern this week for the extra credit: colab.research.google.com/drive/1lsMQ-2f…

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Zach Wissner-Gross @xaqwg

4 weeks ago

Strands #29 “What’s so funny?” 🟡🔵🔵🔵 🔵🔵🔵🔵

Zach Wissner-Gross retweeted
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Tom Keith @tom_keith1

a month ago

#ThisWeeksFiddler by @xaqwg asks us to obtain 5 liters of water using a 10-liter container and a 3-liter container. I found 2 ways to do it, an "additive" method and a "subtractive" method.

Zach Wissner-Gross retweeted
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Jason Weisman @jason_weisman

a month ago

#ThisWeeksFiddler @xaqwg The seed with toughest road in a March Madness style tourney with 2^n teams are the seeds that plays their first games vs the teams with the toughest schedules in 2^(n-1) and 2^(n-2) tourneys. Recursively, F(n)=2^n + 1 - F(n-1), F(1)=2. F ->2/3, G->5/6.

Zach Wissner-Gross retweeted
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Emilie Mitchell @emiliemitchades

a month ago

#ThisWeeksFiddler Assuming the folds on the three sides meet on an altitude of the pizza, this is the area of foil needed based on the distance from the meeting point to the vertex. The minimum is at exactly (5√3 - 5, 112.5). Extra credit: 150√3 in a wide vairety of ways??

Zach Wissner-Gross retweeted
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Tom Keith @tom_keith1

a month ago

#ThisWeeksFiddler by @xaqwg asks what is the smallest rectangular piece of foil you need to wrap up a triangular piece of pizza that is 10 inches on each side. Here is the best I came up with:

Zach Wissner-Gross retweeted
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Tom Keith @tom_keith1

2 months ago

In #ThisWeeksFiddler by @xaqwg, you want to drive around a circular loop. But there’s just one gas station, and a full tank only gets you halfway around. Can your friends help you make it? Here is the full puzzle and my answer: bkgm.com/Fiddler/pdf/Sc…

Zach Wissner-Gross retweeted
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Tom Keith @tom_keith1

2 months ago

#ThisWeeksFiddler by @xaqwg asks us to divide a rectangular birthday cake into 3 equal slices both in terms of frosting and in terms of cake. Here is the full puzzle and my answer: bkgm.com/Fiddler/pdf/Bi…

Zach Wissner-Gross retweeted
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Emilie Mitchell @emiliemitchades

2 months ago

#ThisWeeksFiddler Extra Credit: birthday cake cutting and integrals I don't feel like solving and/or don't remember how to solve! desmos.com/calculator/brm…

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