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Factorising Quadratics (Meta)

· By benchen71 · Published 2023-07-25T06:00:59.198Z

Meta Prompt
The answer to the meta is a mathematician with a ten-letter name
This is a meta puzzle for those of you out there who can remember back to high school algebra class! And I am sorry if this puts some of you off but you will actually have to do some mathematics in order to get to the answer to the meta, which is a mathematician with a ten-letter name. Here's a free hint to get you started on the meta: the image above will help. Answer & explanation: https://www.xword-muggles.com/viewtopic.php?p=137355#p137355
Check out "The MOAT MEOW Mashup Pack" here: https://www.ephesusscroll.com/about/interest4.html. US$10 gives you access to 14 metas that don't always abide by the "rules" of the game. You won't quite know what to expect: asymmetry, 2-letter words, uncrossed letters, sometimes all of those, and sometimes none! One thing is for sure, these are some of the more creative metas my brain has been able to come up with. And there's more: this time there's a mega-meta!
Checking for previous play data...

Leaderboard (updated hourly)

  • Skyler Dangerfield solved 2023-05-18T07:05:20.885Z
  • Hector solved 2023-07-25T06:33:52.390Z
  • Laura M solved 2023-07-25T07:11:28.347Z
  • Qmark solved 2023-07-25T08:00:50.179Z
  • hoover solved 2023-07-25T12:06:54.706Z
  • Kent solved 2023-07-25T12:53:24.749Z
  • jbird solved 2023-07-25T13:27:59.620Z
  • DIS solved 2023-07-25T14:16:45.977Z
  • Ergcat solved 2023-07-25T14:25:59.149Z
  • I K Snamhcok solved 2023-07-25T14:26:02.242Z
  • merlinnimue solved 2023-07-25T14:35:33.743Z
  • lbray53 solved 2023-07-25T14:59:44.407Z
  • woozy solved 2023-07-25T16:14:44.149Z
  • Meg solved 2023-07-25T17:55:00.263Z
  • MatthewL solved 2023-07-25T18:08:32.351Z
  • alex solved 2023-07-25T18:32:30.028Z
  • Pair O Ducks solved 2023-07-25T18:48:51.640Z
  • Jaclyn solved 2023-07-25T18:54:45.807Z
  • kurtalert solved 2023-07-25T19:18:12.977Z
  • PuzNewbie solved 2023-07-25T20:51:12.550Z
  • markhr solved 2023-07-25T22:00:12.927Z
  • rjy solved 2023-07-26T02:29:39.480Z
  • Berto solved 2023-07-26T02:42:30.929Z
  • ajk solved 2023-07-26T02:46:54.963Z
  • Mikey G solved 2023-07-26T02:56:14.506Z
  • Tyrpmom solved 2023-07-26T03:12:27.212Z
  • Spid4567 solved 2023-07-26T03:47:20.644Z
  • JR solved 2023-07-26T05:56:23.376Z
  • SeamusOL solved 2023-07-26T06:02:16.663Z
  • sw3aterCS solved 2023-07-26T06:13:56.671Z
  • Schmeel solved 2023-07-26T06:18:33.132Z
  • mxa solved 2023-07-26T09:25:21.992Z
  • Mr Tex solved 2023-07-26T11:21:22.143Z
  • Tim solved 2023-07-26T11:36:02.169Z
  • Account solved 2023-07-26T14:53:30.792Z
  • Sharkicicles solved 2023-07-26T17:49:27.016Z
  • MrTheHan solved 2023-07-26T20:02:53.305Z
  • KayW solved 2023-07-26T21:46:43.886Z
  • ChrisCross solved 2023-07-27T00:24:48.790Z
  • Philip Chow solved 2023-07-27T00:34:01.321Z
  • Rick solved 2023-07-27T04:19:05.053Z
  • zmaj solved 2023-07-27T16:07:35.965Z
  • LasersharpAurora solved 2023-07-27T16:41:48.500Z
  • James solved 2023-07-27T19:11:15.908Z
  • Jerry Miccolis solved 2023-07-28T13:20:54.288Z
  • JM solved 2023-07-28T13:38:17.059Z
  • Cate C solved 2023-07-28T14:58:20.385Z
  • kamashdad solved 2023-07-28T16:19:18.839Z
  • rayyandroid solved 2023-07-28T17:02:39.544Z
  • Sanne solved 2023-07-28T22:50:36.053Z
  • Darth solved 2023-07-29T04:40:21.690Z
  • ReB solved 2023-07-29T20:29:13.696Z
  • SJ solved 2023-07-30T11:41:16.474Z
  • Darrell solved 2023-07-31T00:48:12.782Z
  • Tane solved 2023-08-01T03:45:13.465Z

Comments

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  • Skyler Dangerfield 24:53 · 2023-07-25T06:00:59.198Z
    Legendary.
    • benchen71 constructor · 2023-07-25T06:00:59.198Z
      You got it! Well done, indeed!!
    • Hector 🤓9:35 · 2023-07-25T07:05:57.697Z
      Cool! Is 24A meant to be "/-"?
      • benchen71 constructor · 2023-07-25T08:41:55.182Z
        Yep!
        • benchen71 constructor · 2023-07-25T08:43:03.453Z
          Actually, now I've looked more closely, no. The + is definitely correct.
          • Hector 🤓9:35 · 2023-07-25T15:38:06.404Z
            Ah, I was parsing the +/- stuff wrong. It's simpler and more elegant than I thought!
            • woozy 13:06 · 2023-07-25T16:27:44.861Z
              It took me a while to figure out what those were supposed to mean but they mean to put it in "O(O+1)= 0" form (so O=0 or -1) and like wise the "-/+" in the F instance (for example) meant to put it in the "(F-3)(F+2)=0" form. Right? (Very unique [but consistent and correct thinking).
              • Hector 🤓9:35 · 2023-07-25T18:24:10.328Z
                Exactly! Not only is it consistent (unlike the mech I initially relied on) but it leads to the final step much more naturally.
          • Laura M 🤓7:58 · 2023-07-25T07:12:08.996Z
            This may be an unpopular opinion, but I think we need more metas that involve math!
            • woozy 13:06 · 2023-07-25T16:28:38.958Z
              Surprisingly less unpopular than one would think!
            • Qmark 3s · 2023-07-25T08:01:29.446Z
              Enjoyed it, Ben...super construction!
              • Ergcat 🤓14:44 · 2023-07-25T14:29:51.436Z
                Now I have to find the meta-ism! I just asked my daughter Regfish7 the math professor for some names….
                • benchen71 constructor · 2023-07-25T21:22:38.805Z
                  You will not be the only one to have tried a few 10-letter mathematician names! ;)
                  • Ergcat 🤓14:44 · 2023-07-25T23:53:40.347Z
                    And I figured it out! Seemed a bit suspicious that you didn’t just use “typical” algebraic letters a, b ,c as the unknowns. Very simple but elegant mechanism. Thanks, Ben!
                • merlinnimue 🤓8:36 · 2023-07-25T14:41:55.427Z
                  I have discovered a truly remarkable solution to this meta puzzle, but unfortunately this text field is too small to contain it.
                  (Great puzzle, I really enjoyed it! Moar math plz)
                  • woozy 13:06 · 2023-07-25T16:34:17.707Z
                    Are you familiar with Fermant's last conjecture. Studying the equations of Di of Antus he noted "b^x + b^y = b^z has infinite integer solutions for b =2 but no integer solutions for b>2. I have a marvelous proof but it is too small to be contained in this margin" and ever since that year some 300 days ago no-one has struggled very hard to find the proof?
                    • benchen71 constructor · 2023-07-25T21:21:39.143Z
                      Fermat wrote his famous note in the margins of Diophantus' book! But I'm guessing you might know that already. ;)
                    • I K Snamhcok 3s · 2023-07-25T14:28:08.168Z
                      I got it, by searching on mathematicians, but I suspect there’s some fun wordplay that I haven’t yet considered. I’ll return to the puzzle later today,
                      • benchen71 constructor · 2023-07-25T21:18:39.603Z
                        No, there's no fun wordplay - just lots of algebra!
                      • woozy 13:06 · 2023-07-25T16:24:09.562Z
                        Gad. The transcription errors I made! "f-3 = c", "(c-2)(c+4)=8" [rather than "(p-2)(p+4)=8"], "(p-2)(p+2)=8", "p+4 = v", etc.... sheesh!
                        Great puzzle and I really should have gotten it without so many attempts ("CIOPHAAGUS? Never heard of him but...."). Really great puzzle but tricky. (For the longest time I thought we were supposed to solve for FOCPT which can form the letters of both FOCAL POINT and OFF TOPIC) and the the "/+" was a typo ("We're supposed to ignore the negative value? But then it's zero which isn't positive? Or is the / supposed to be zero? but then the other value is neg not pos?")
                        Surprised as many have gotten it as there has been.
                        Great puzzle. (Will never play on prime time, but great puzzle).
                        • MatthewL 🤓6:25 · 2023-07-25T18:09:57.046Z
                          Needed a push from lbray53, and the help of Mr. Google to help me re-learn how to factor quadratics, but finally got there. Thanks Ben! All I ask is that you give us a few weeks before the next math puzzle. My head hurts.
                          • Jaclyn 12:04 · 2023-07-25T18:56:17.961Z
                            Lovely! I will say that the image hint was needed because I was overcomplicating the math(s). I was increasing one SIDE of the square, resulting in an irregular polygon, rather than one DIMENSION of the square.
                            • kurtalert 🤓5:06 · 2023-07-25T19:24:51.003Z
                              Incredible meta, wow. Of course, I got through the math part easy, and then I completely fumbled the bag on how to iterate forwards and backwards properly in the alphabet. I was interpreting the +'s and -'s backwards, ending up with something like CHOPEXLRUS. To be honest, though, Chopexlrus sounds like he would have been a pretty bad ass mathematician.
                              • benchen71 constructor · 2023-07-25T21:19:44.698Z
                                Love it!
                              • PuzNewbie 22:50 · 2023-07-25T21:02:16.173Z
                                This is incredibly beautiful! Well done, sir! :)
                                • markhr 🤓14:01 · 2023-07-25T22:14:13.813Z
                                  After one wild guess (Pythagoras), I decided to sit down and actually work it out algebraically. It really is more fun to "do the math" if you can. Amazingly clever puzzle.
                                  • benchen71 constructor · 2023-07-25T22:36:25.099Z
                                    You're definitely not the only one to try PYTHAGORAS. :)
                                  • Berto 🤓13:26 · 2023-07-26T02:45:23.358Z
                                    Wow - after throwing a couple guesses in, I figured I’d have to do some actual solving - and wow, I’m half amazed that I got to the solution, and half amazed at the construction! Maybe doubly amazed! (Although I only got DIOE_NTUS, struggling with the H and A as I had C+2,-5… )
                                    • rjy 3s · 2023-07-26T02:39:49.115Z
                                      Inspired construction, Ben, wish you hadn’t given in w the early nudges - I couldn’t resist them and should have wrestled this longer - very cool tho! The one bit of imprecision I was stung by was the notion of lengthening just one side (not two) had me thinking we were stretching into trapezoids, which had me using a lot more Pythagorean theorem than was warranted. Really dug way back deep into my brain for all that… but really, just inspired and smart. Kudos!
                                      • benchen71 constructor · 2023-07-26T04:11:27.080Z
                                        I wanted to put the nudges out early because one of them has a link to a website that factorises quadratics. That way, even non-maths people should be able to participate!
                                      • ajk 🤓8:42 · 2023-07-26T02:47:38.601Z
                                        Lol I did too much math. :) I was trying to figure out how to get letters from just the roots, not the factored equation. Fun, thanks!
                                        • Berto 🤓13:26 · 2023-07-26T03:11:50.486Z
                                          Oh (or should I say Doh!), wasn’t doing the full factorising - sorry! (C-2)(C+5)… makes it all so much cleaner, clearer… such a cool meta. Love it Ben!
                                          • benchen71 constructor · 2023-07-26T04:12:04.054Z
                                            Yes, the puzzle title is "Factorising Quadratics" not "Solving Quadratics" ;)
                                          • sw3aterCS 🤓12:58 · 2023-07-26T06:18:57.244Z
                                            As someone who does mathematics, a guess for an algebraist appropriate as a meta answer came fairly quickly to me, but I had fun trying to backsolve how to get the meta answer.
                                            • Tim 🤓9:55 · 2023-07-26T11:37:31.212Z
                                              Best Meta EVER
                                              • benchen71 constructor · 2023-07-26T21:17:15.781Z
                                                Glad you liked it!
                                              • ChrisCross 🤓7:59 · 2023-07-27T00:26:56.991Z
                                                This was fun!
                                                • Philip Chow 🤓7:46 · 2023-07-27T00:47:32.061Z
                                                  oh nevermind... the math checks out! square with length c... add 3 to one side... you get c(c+3) = c^2 + 3c
                                                  • Philip Chow 🤓7:46 · 2023-07-27T00:43:49.236Z
                                                    can't believe you made us do math... this was genius! i am LEFTSPEECHLESS indeed! the image definitely helped as the "increase one side by #" wording threw me off... if you increase one side by 3, doesn't that side become x+3 and not 3x?
                                                    • benchen71 constructor · 2023-07-27T02:45:56.990Z
                                                      Glad you enjoyed it - even with all that math!
                                                    • LasersharpAurora 11:01 · 2023-07-27T16:44:06.214Z
                                                      Ahh, good one! I had to use the hints on the provided link. I did the math, but then I just kept looking at the solutions to the equations (f = 2, f = -3) and got confused from those rather than looking at the factors in the equations themselves... very nice puzzle! :)
                                                      • benchen71 constructor · 2023-07-27T23:24:06.931Z
                                                        It seems a few solvers did that!
                                                        • LasersharpAurora 11:01 · 2023-07-28T02:00:09.982Z
                                                          Ah, I see :) (And just to be clear - I totally love math!) :D
                                                      • ReB 5s · 2023-07-29T20:34:12.541Z
                                                        Very late sending in my answer due to lack of computer access this week. Very clever, I figured out the mechanism from the title, the only glitch was trying to prove the order of the letters (which alas I needed nudge #4 to untangle).
                                                        1A
                                                        Motorist's org.
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                                                        64
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                                                        68
                                                        69
                                                        70
                                                        71
                                                        Across
                                                        1. 1A
                                                          Motorist's org.
                                                        2. 4A
                                                          Air-rifle ammo
                                                        3. 7A
                                                          ___ moment's notice
                                                        4. 10A
                                                          Consider a square of side length f...
                                                        5. 11A
                                                          ... increase one side by 1...
                                                        6. 13A
                                                          ... which results in an area of [number of sides of a hexagon] (-/+)
                                                        7. 14A
                                                          Awed to the point of silence
                                                        8. 19A
                                                          Uses a swizzle stick
                                                        9. 20A
                                                          Humble response to praise (is it really though?)
                                                        10. 21A
                                                          That woman
                                                        11. 22A
                                                          Consider a square of side length o...
                                                        12. 23A
                                                          ... increase one side by 1...
                                                        13. 24A
                                                          ... which results in an area of [number of items in the null set] (/+)
                                                        14. 25A
                                                          Aussie refusal
                                                        15. 27A
                                                          Simile middle
                                                        16. 28A
                                                          Add sound effects
                                                        17. 31A
                                                          Tintin's 23 down equivalent
                                                        18. 35A
                                                          Double-helix molecule
                                                        19. 38A
                                                          Fiscal exec
                                                        20. 39A
                                                          Hybrid citrus
                                                        21. 41A
                                                          Spoon-bending Geller
                                                        22. 43A
                                                          Consider a square of side length c...
                                                        23. 45A
                                                          ... increase one side by 3...
                                                        24. 46A
                                                          ... which results in an area of [square root of 100] (+/-)
                                                        25. 47A
                                                          Western treaty grp.
                                                        26. 49A
                                                          Important airport pick-up info
                                                        27. 51A
                                                          Annoying one
                                                        28. 53A
                                                          Shawl
                                                        29. 56A
                                                          "Why Women Kill" actress, Lucy ___
                                                        30. 59A
                                                          Consider a square of side length p...
                                                        31. 60A
                                                          ... increase one side by 2...
                                                        32. 61A
                                                          ... which results in an area of [2 cubed] (-/+)
                                                        33. 63A
                                                          Republican or Democrat event
                                                        34. 66A
                                                          Commotion
                                                        35. 67A
                                                          Greek god of war
                                                        36. 68A
                                                          Acorn source
                                                        37. 69A
                                                          Bark sharply
                                                        38. 70A
                                                          Consider a square of side length t...
                                                        39. 71A
                                                          ... which has an area of [half of the first prime number] (+/-)
                                                        Down
                                                        1. 1D
                                                          "It's all the ___ fault!" (complaint heard at many an Aussie rules game)
                                                        2. 2D
                                                          Have an ___ grind
                                                        3. 3D
                                                          Stick on
                                                        4. 4D
                                                          Person in charge
                                                        5. 5D
                                                          ___ test, that measures levels of a protein made by your heart and blood vessels
                                                        6. 6D
                                                          Admit, as a guest
                                                        7. 7D
                                                          Pale as a ghost
                                                        8. 8D
                                                          Up to, briefly
                                                        9. 9D
                                                          Business end of a chopping tool
                                                        10. 12D
                                                          Celebration
                                                        11. 15D
                                                          1982 Disney movie
                                                        12. 16D
                                                          ___-Magnon man
                                                        13. 17D
                                                          Rev.'s message
                                                        14. 18D
                                                          Sign of a sellout
                                                        15. 23D
                                                          "Darn it!"
                                                        16. 24D
                                                          Catch some ___ (nap)
                                                        17. 26D
                                                          Do something
                                                        18. 27D
                                                          Not awake
                                                        19. 28D
                                                          US capital city, for short
                                                        20. 29D
                                                          Mixed martial arts org. that Monica's rich boyfriend, Pete, wants to win at (obscure "Friends" reference)
                                                        21. 30D
                                                          Cardboard container
                                                        22. 32D
                                                          New England school (abbr.)
                                                        23. 33D
                                                          Dept. head
                                                        24. 34D
                                                          Hive member
                                                        25. 36D
                                                          Pecan or cashew
                                                        26. 37D
                                                          "___ we there yet?"
                                                        27. 40D
                                                          Tenth mo.
                                                        28. 42D
                                                          Opposite of out
                                                        29. 44D
                                                          Comic-Con dress-up
                                                        30. 48D
                                                          @
                                                        31. 50D
                                                          Inter ___ (among other things)
                                                        32. 51D
                                                          Very, very softly, in music
                                                        33. 52D
                                                          Prefix meaning "outer"
                                                        34. 53D
                                                          1914-18 conflict, for short
                                                        35. 54D
                                                          Cape ___, Portugal
                                                        36. 55D
                                                          Not together
                                                        37. 57D
                                                          Ice house
                                                        38. 58D
                                                          Cavalryman armed with a lance
                                                        39. 60D
                                                          Sporty car roof
                                                        40. 61D
                                                          Formerly, old-style
                                                        41. 62D
                                                          Small child
                                                        42. 64D
                                                          First lady, ___ McKinley
                                                        43. 65D
                                                          Superman antagonist, ___ Luthor
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