Uncanny Addition












4












$begingroup$


  ? ?

+   ?

-----

    ?


Replace every question mark (?) in this addition with a single digit so that the addition is valid and correct. The first (leftmost) question mark in the first (upper) line cannot be zero (0).



Credit:




(2000@G4G) Jaime Poniachik (1943–2011)







mathematics lateral-thinking addition







share|improve this question











$endgroup$












  • $begingroup$
    Are rot13(artngvir qvtvgf) allowed?
    $endgroup$
    – Rand al'Thor
    yesterday










  • $begingroup$
    @Randal'Thor No, they are not
    $endgroup$
    – yunzen
    yesterday
















4












$begingroup$


  ? ?

+   ?

-----

    ?


Replace every question mark (?) in this addition with a single digit so that the addition is valid and correct. The first (leftmost) question mark in the first (upper) line cannot be zero (0).



Credit:




(2000@G4G) Jaime Poniachik (1943–2011)







mathematics lateral-thinking addition







share|improve this question











$endgroup$












  • $begingroup$
    Are rot13(artngvir qvtvgf) allowed?
    $endgroup$
    – Rand al'Thor
    yesterday










  • $begingroup$
    @Randal'Thor No, they are not
    $endgroup$
    – yunzen
    yesterday














4












4








4


1



$begingroup$


  ? ?

+   ?

-----

    ?


Replace every question mark (?) in this addition with a single digit so that the addition is valid and correct. The first (leftmost) question mark in the first (upper) line cannot be zero (0).



Credit:




(2000@G4G) Jaime Poniachik (1943–2011)







mathematics lateral-thinking addition







share|improve this question











$endgroup$




  ? ?

+   ?

-----

    ?


Replace every question mark (?) in this addition with a single digit so that the addition is valid and correct. The first (leftmost) question mark in the first (upper) line cannot be zero (0).



Credit:




(2000@G4G) Jaime Poniachik (1943–2011)







mathematics lateral-thinking addition




mathematics lateral-thinking addition






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited yesterday









GentlePurpleRain♦

16.9k568136




16.9k568136










asked yesterday









yunzenyunzen

43611




43611












  • $begingroup$
    Are rot13(artngvir qvtvgf) allowed?
    $endgroup$
    – Rand al'Thor
    yesterday










  • $begingroup$
    @Randal'Thor No, they are not
    $endgroup$
    – yunzen
    yesterday


















  • $begingroup$
    Are rot13(artngvir qvtvgf) allowed?
    $endgroup$
    – Rand al'Thor
    yesterday










  • $begingroup$
    @Randal'Thor No, they are not
    $endgroup$
    – yunzen
    yesterday
















$begingroup$
Are rot13(artngvir qvtvgf) allowed?
$endgroup$
– Rand al'Thor
yesterday




$begingroup$
Are rot13(artngvir qvtvgf) allowed?
$endgroup$
– Rand al'Thor
yesterday












$begingroup$
@Randal'Thor No, they are not
$endgroup$
– yunzen
yesterday




$begingroup$
@Randal'Thor No, they are not
$endgroup$
– yunzen
yesterday










3 Answers
3






active

oldest

votes


















8












$begingroup$

Following in @jafe's footsteps:







    I V          I X        X C

  +   I        +   I      +   X

 ------   or   -----  or  -----  etc.

      V            X          C






share|improve this answer









$endgroup$





















    6












    $begingroup$

    One possibility would be using




    some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.




    For example,




    using rod numerals:

    enter image description here







    share|improve this answer











    $endgroup$













    • $begingroup$
      Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
      $endgroup$
      – yunzen
      yesterday



















    2












    $begingroup$


    Mixing bases is the first thing I can think of, e.g.:
    $10_2 + 1_2 = 3_{10}$







    share|improve this answer











    $endgroup$













    • $begingroup$
      Interesting approach. rot13(Ab onfr punatr)
      $endgroup$
      – yunzen
      yesterday











    Your Answer





    StackExchange.ifUsing("editor", function () {
    return StackExchange.using("mathjaxEditing", function () {
    StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
    StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
    });
    });
    }, "mathjax-editing");

    StackExchange.ready(function() {
    var channelOptions = {
    tags: "".split(" "),
    id: "559"
    };
    initTagRenderer("".split(" "), "".split(" "), channelOptions);

    StackExchange.using("externalEditor", function() {
    // Have to fire editor after snippets, if snippets enabled
    if (StackExchange.settings.snippets.snippetsEnabled) {
    StackExchange.using("snippets", function() {
    createEditor();
    });
    }
    else {
    createEditor();
    }
    });

    function createEditor() {
    StackExchange.prepareEditor({
    heartbeatType: 'answer',
    autoActivateHeartbeat: false,
    convertImagesToLinks: false,
    noModals: true,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: null,
    bindNavPrevention: true,
    postfix: "",
    imageUploader: {
    brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
    contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
    allowUrls: true
    },
    noCode: true, onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    });


    }
    });














    draft saved

    draft discarded


















    StackExchange.ready(
    function () {
    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fpuzzling.stackexchange.com%2fquestions%2f78986%2funcanny-addition%23new-answer', 'question_page');
    }
    );

    Post as a guest















    Required, but never shown

























    3 Answers
    3






    active

    oldest

    votes








    3 Answers
    3






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    8












    $begingroup$

    Following in @jafe's footsteps:






    
    I V          I X        X C
    
  +   I        +   I      +   X
    
 ------   or   -----  or  -----  etc.
    
      V            X          C






    share|improve this answer









    $endgroup$


















      8












      $begingroup$

      Following in @jafe's footsteps:






      
    I V          I X        X C
      
  +   I        +   I      +   X
      
 ------   or   -----  or  -----  etc.
      
      V            X          C






      share|improve this answer









      $endgroup$
















        8












        8








        8





        $begingroup$

        Following in @jafe's footsteps:






        
    I V          I X        X C
        
  +   I        +   I      +   X
        
 ------   or   -----  or  -----  etc.
        
      V            X          C






        share|improve this answer









        $endgroup$



        Following in @jafe's footsteps:






        
    I V          I X        X C
        
  +   I        +   I      +   X
        
 ------   or   -----  or  -----  etc.
        
      V            X          C







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered yesterday









        BassBass

        29k470177




        29k470177























            6












            $begingroup$

            One possibility would be using




            some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.




            For example,




            using rod numerals:

            enter image description here







            share|improve this answer











            $endgroup$













            • $begingroup$
              Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
              $endgroup$
              – yunzen
              yesterday
















            6












            $begingroup$

            One possibility would be using




            some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.




            For example,




            using rod numerals:

            enter image description here







            share|improve this answer











            $endgroup$













            • $begingroup$
              Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
              $endgroup$
              – yunzen
              yesterday














            6












            6








            6





            $begingroup$

            One possibility would be using




            some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.




            For example,




            using rod numerals:

            enter image description here







            share|improve this answer











            $endgroup$



            One possibility would be using




            some other numbering system than Arabic numerals. The word "digit" can be used for other systems as well.




            For example,




            using rod numerals:

            enter image description here








            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited yesterday

























            answered yesterday









            jafejafe

            19.9k457199




            19.9k457199












            • $begingroup$
              Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
              $endgroup$
              – yunzen
              yesterday


















            • $begingroup$
              Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
              $endgroup$
              – yunzen
              yesterday
















            $begingroup$
            Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
            $endgroup$
            – yunzen
            yesterday




            $begingroup$
            Guvf vf gur evtug nccebnpu. V qba'g xabj, vs ebq ahzrenyf fubhyq pbhag nf n pbeerpg nafjre, ohg vg vf abg gur vagraqrq bar.
            $endgroup$
            – yunzen
            yesterday











            2












            $begingroup$


            Mixing bases is the first thing I can think of, e.g.:
            $10_2 + 1_2 = 3_{10}$







            share|improve this answer











            $endgroup$













            • $begingroup$
              Interesting approach. rot13(Ab onfr punatr)
              $endgroup$
              – yunzen
              yesterday
















            2












            $begingroup$


            Mixing bases is the first thing I can think of, e.g.:
            $10_2 + 1_2 = 3_{10}$







            share|improve this answer











            $endgroup$













            • $begingroup$
              Interesting approach. rot13(Ab onfr punatr)
              $endgroup$
              – yunzen
              yesterday














            2












            2








            2





            $begingroup$


            Mixing bases is the first thing I can think of, e.g.:
            $10_2 + 1_2 = 3_{10}$







            share|improve this answer











            $endgroup$




            Mixing bases is the first thing I can think of, e.g.:
            $10_2 + 1_2 = 3_{10}$








            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited yesterday









            GentlePurpleRain♦

            16.9k568136




            16.9k568136










            answered yesterday









            AHKieranAHKieran

            4,953940




            4,953940












            • $begingroup$
              Interesting approach. rot13(Ab onfr punatr)
              $endgroup$
              – yunzen
              yesterday


















            • $begingroup$
              Interesting approach. rot13(Ab onfr punatr)
              $endgroup$
              – yunzen
              yesterday
















            $begingroup$
            Interesting approach. rot13(Ab onfr punatr)
            $endgroup$
            – yunzen
            yesterday




            $begingroup$
            Interesting approach. rot13(Ab onfr punatr)
            $endgroup$
            – yunzen
            yesterday


















            draft saved

            draft discarded




















































            Thanks for contributing an answer to Puzzling Stack Exchange!


            • Please be sure to answer the question. Provide details and share your research!

            But avoid …



            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.


            Use MathJax to format equations. MathJax reference.


            To learn more, see our tips on writing great answers.




            draft saved


            draft discarded














            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fpuzzling.stackexchange.com%2fquestions%2f78986%2funcanny-addition%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown





















































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown

































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown







            -

            Popular posts from this blog

            "Incorrect syntax near the keyword 'ON'. (on update cascade, on delete cascade,)

            Image
            .everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box; } 2 total noob sorry any help greatly appreciated. I keep getting this "Incorrect syntax near the keyword 'ON'." heres my codes code one CREATE TABLE supplier ( supplierID INT PRIMARY KEY, ISBN INT FOREIGN KEY REFERENCES book(ISBN), price DECIMAL (5,2), ON UPDATE CASCADE, ON DELETE CASCADE, ); code two CREATE TABLE orders ( orderID INT PRIMARY KEY, customerID INT FOREIGN KEY REFERENCES customer(customerID), ISBN INT FOREIGN KEY REFERENCES book(ISBN), orderDate date, ON UPDATE CASCADE, ON DELETE CASCADE, ); Ive run out of stuff to try other than dumbing it down to uselessness. ...
            Read more

            Alcedinidae

            Image
            Alcedinidae Martin-pêcheur à dos bleu ( Alcedo azurea ) Classification (COI) Règne Animalia Embranchement Chordata Sous-embr. Vertebrata Classe Aves Ordre Coraciiformes Famille Alcedinidae Rafinesque, 1815 Les Alcédinidés ou Alcedinidae forment une famille d'oiseaux plus connus sous les noms de martins-pêcheurs et martins-chasseurs. Sommaire 1 Description 2 Répartition et habitat 3 Systématique 3.1 Liste alphabétique des genres 3.2 Liste des espèces 4 Chez les Anciens : l'alcyon 4.1 Étymologie (Littré) 4.2 Oiseau « fabuleux » ? 5 Notes 6 Articles connexes 7 Liens externes 7.1 Bibliographie Description | Ce sont des oiseaux compacts de taille petite à moyenne (10 à 46 cm), au bec droit et long, en forme de poignard. Leurs pattes sont courtes, et ils portent un plumage aux couleurs vives. Répartition et habitat | Cosmopolites, ils fréquentent surtout ...
            Read more

            Origin of the phrase “under your belt”?

            Image
            .everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0; } 17 1 Today, I found myself discussing what students should have "under their belts" during a lecture, and I wondered to myself if there was some inappropriate undertone here that I might be unaware of. Question : What is the origin of the phrase "under your belt"? A google search revealed some webpages (e.g. [1]) that assert its origin is related to consumption of food -- once a meal has been eaten, it's under your belt (which is a relief). However, with such websites, I have no way to determine fact from "random guy on the internet making stuff up". etymology idioms ...
            Read more