#ThisWeeksRiddler
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david-ding.bsky.social
My very first tweet of my 30s is about #ThisWeeksRiddler Express puzzle on 🎂, whereby even with infinite friends taking a slice, you will get a nice portion of the treat in the end. #mindblown #birthdaycake #birthdaytweet@xaqwg

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David Ding: Riddler Express May 14, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
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January 28, 2025 at 8:09 PM
david-ding.bsky.social
It's all about the choices (via the choose function) when it comes to #ThisWeeksRiddler Classic from @xaqwg

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Math Choices
Riddler Classic: June 17, 2022
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January 28, 2025 at 8:20 PM
david-ding.bsky.social
on #ThisWeeksRiddler Classic, I missed the name of the game being #Riddler solitaire and called it #Joker #Blackjack instead🤦‍♂️. Nonetheless, it was a wonderful puzzle by @Hendrikc44! Simulations performed using @MATLAB.@xaqwg

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David Ding: Riddler Classic June 25, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
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January 28, 2025 at 8:10 PM
david-ding.bsky.social
On #ThisWeeksRiddler Express, a marbles probability puzzle turned into prime factorization for the missing piece:@xaqwg

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David Ding: Riddler Express June 25, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
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January 28, 2025 at 8:10 PM
david-ding.bsky.social
For #ThisWeeksRiddler Express, no calculus required to figure out the bounds on the Velo-ton:@xaqwg

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David Ding: Riddler Express October 1, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
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January 28, 2025 at 8:12 PM
david-ding.bsky.social
For #ThisWeeksRiddler Classic, a hint of what's going on is in the graph below. Of course, if anyone finds a triply-perfect number, let me know!

@xaqwg

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January 28, 2025 at 8:08 PM
david-ding.bsky.social
The game of "Dice Poker" on #ThisWeeksRiddler Classic seems to be a little...linear. @xaqwg

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January 28, 2025 at 8:11 PM
david-ding.bsky.social
For #ThisWeeksRiddler Classic, lots of tradeoffs as we play with light polarizers. 🔦 @xaqwg

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Lighting the Way
Riddler Classic February 4, 2022
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January 28, 2025 at 8:15 PM
david-ding.bsky.social
For #ThisWeeksRiddler Classic, the answer of 3/4 can be intuitively explained as the average of two extremes: either your lead is so large that the second run makes no diff, or your lead is so narrow the second run decides the game.

Analytically:@xaqwg

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January 28, 2025 at 8:06 PM
david-ding.bsky.social
Two ways to figure out the 📐probability from the strings purchased using the four coins given: exhaustive search using #MATLAB and just plain #ProbabilityTheory, on #ThisWeeksRiddler.@xaqwg @MATLAB @MathWorks

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David Ding: Riddler Express March 5, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
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January 28, 2025 at 8:08 PM
david-ding.bsky.social
Missed out on Battle of Riddler Nation last week due to road trip, making up in #ThisWeeksRiddler Express for the post-mortem @xaqwg

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Strategizing Battle for Riddler Nation
Riddler Express: September 9, 2022
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January 28, 2025 at 8:21 PM
david-ding.bsky.social
For my one year anniversary of stumbling upon the #Riddler, one of the nicer columns I've ever came across, I present #ThisWeeksRiddler Express, where being a gym rat means beating the 1/(golden ratio) mark.
💪🐭📐

#RiddlerAnniversary @xaqwg

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G(olden)ym Rat(io)
Riddler Express November 19, 2021
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January 28, 2025 at 8:13 PM
david-ding.bsky.social
On #ThisWeeksRiddler Express, there's always work! (Until the last day). @xaqwg

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There's Always Work
Riddler Express: July 1, 2022
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January 28, 2025 at 8:20 PM
david-ding.bsky.social
I thoroughly enjoyed #ThisWeeksRiddler, both Express and Classic. Great puzzles from talented and creative young minds! Here is my attempt at the Classic:@xaqwg

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Finding Carmichael
Riddler Classic: April 15, 2022
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January 28, 2025 at 8:18 PM
david-ding.bsky.social
For #ThisWeeksRiddler inspired by the #SquidGame, aka the #Squiddler 🦑❓, K contestants crossing a bridge of N pairs of glass panels will on average yield max(0, K - N/2) survivors. Geometric distribution + memorylessness is the key. @xaqwg
January 28, 2025 at 8:12 PM
david-ding.bsky.social
For #ThisWeeksRiddler Classic by @xaqwg, it appears that the grasshopper is taking a random walk (hop)...🦗

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Patient Patients
Riddler Classic: June 10, 2022
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January 28, 2025 at 8:19 PM
david-ding.bsky.social
For #ThisWeeksRiddler Classic, I think @xaqwg missed out on calling the puzzle "Parallax Wax"! 😁

Happy #Ramadan!

P.S. I started out by assuming the Moon is a cylinder, for some reason...

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January 28, 2025 at 8:08 PM
david-ding.bsky.social
Look, as an @NYTimesGames Crossword Enthusiast, @FiveThirtyEight's #Riddler CrossProducts is taking up a fight and yeah, I swapped letters for numbers for a weekend.#ThisWeeksRiddler @xaqwg

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David Ding: Riddler Express February 5, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
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January 28, 2025 at 8:07 PM
david-ding.bsky.social
On #ThisWeeksRiddler Express I show the power of polynomials covering all the bases--no need to oscillate via sinusoids. @xaqwg

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January 28, 2025 at 8:16 PM
david-ding.bsky.social
Well, the answer isn't 100%, for #ThisWeeksRiddler Express of "Are you clever enough?". @xaqwg

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David Ding: Riddler Express August 13, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
www.davidyding.com
January 28, 2025 at 8:11 PM
david-ding.bsky.social
On #ThisWeeksRiddler express, I am trying to redeem my #MarchMadness bracket with my #MarchMathness...let's say...quadratic equation? 🏀🏀🏀@xaqwg

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David Ding: Riddler Express March 26, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
www.davidyding.com
January 28, 2025 at 8:08 PM
david-ding.bsky.social
For #ThisWeeksRiddler Classic, the lucky coin probability converges to a mysterious value. ❓🪙❓@xaqwg

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Approach of the Lucky Coin
Riddler Classic: February 18, 2022
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January 28, 2025 at 8:16 PM
david-ding.bsky.social
There was an aha!-moment for me while solving #ThisWeeksRiddler Classic, literally. 😉
@xaqwg

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David Ding: Riddler Classic June 4, 2021
Welcome to David Ding's Personal Website. I like to explore, design, create, and learn!
www.davidyding.com
January 28, 2025 at 8:09 PM
david-ding.bsky.social
For #ThisWeeksRiddler Express, the hacker might want to consider more carefully where to place the bounds:@xaqwg

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Hacking Distributions
Riddler Express: February 18, 2022
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January 28, 2025 at 8:16 PM
david-ding.bsky.social
"...And then Arizona Ordinals successfully defeated the Cleveland Brownian Motion to win the inaugural Riddler Football League's Super Bowl.", on #ThisWeeksRiddler 🏈@xaqwg

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Riddler Football League
Riddler Express January 7, 2022
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January 28, 2025 at 8:13 PM