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Cryptic Math Brain Teaser

math brainteaser lateral thinking

Can you prove that the above addition sum is correct? May need to use some lateral thinking here!

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16 Comments to “Cryptic Math Brain Teaser”


  1. bobg | Profile

    the “numbers” are words written upside down:
    one
    nine
    one
    eight +
    —–
    nineteen


  2. Jimmy Anders | PUZZLE MASTER | Profile

    Lateral thinking or upside-down viewing


  3. suineg | PUZZLE MASTER | Profile

    ok, its like this: the sum is of letters reversed:
    ONE +
    NINE +
    ONE +
    EIGHT =
    NINETEEN


    Very very nice puzzle.


    @RK: A suggestion to the new system could be this:
    any person could check the summitted answers any time, and can put its suggestion or question of the answers anytime, however if someone sneak the answer before they put their answer you flag them, so the only answers to be taken as true are the ones that the user put before they sneak the answer, and you still post 2-3 days period the official answer and the list of the solvers with this rule.


    I think it could work because the ones that wanna solve will take the time to appear in the list of the solvers, but also the ones who just want to see the answers could do it also


  4. mjtut | Profile

    It’s correct, I saw that it was upsidedown, or at least how u can spell words out with a calculator then flip them upside down to get words,the words are one, nine, one, eight, that adds up to nineteen.


  5. Shawn | PUZZLE GRANDMASTER | Profile

    Flip the puzzle upside down and you will find a new summation that works!


  6. RK | Founder | Profile

    Thanks for your suggestions Suineg;


    we’ll see how things go over the next week or so.


  7. Hex | PUZZLE MASTER | Profile

    8+1+9+1=19..pretty obvious


    @Suineg, your proposal will not work as you could log out, inspect the answers and log back in :D


  8. Mashplum | PUZZLE MASTER | Profile

    Read upside-down:
    one + nine + one + eight = nineteen


  9. suineg | PUZZLE MASTER | Profile

    jajaja, never though of that Hex, Because the visitors have to still be able to see the answers jajaja, well maybe its more like a selfchalleging to not look the answer and post, but let me tell you a problem like the complex clock puzzle of bilbao will test the most honest and puzzle lover man.


  10. Hex | PUZZLE MASTER | Profile

    @Suineg:
    There is a solution, though complicated, to this dilemma:
    Visitors cannot see the comments until a certain time that is set for each puzzle elapses.
    A note regarding the above should be clear. That will be an incentive to visitors to register and log in.
    Logged-in users will be unmasked if they see the answers before posting.


    Of course, this is not foolproof as some smart alecs may register under a different user just to view the answers without being unmasked.


  11. RK | Founder | Profile

    Hey Guy,thanks for your thoughts about the new answer/comment section. Still trying to see how the current system plays out; in another 1-2 weeks, we can take an informal vote to see what people like best


    And the answer to this one was ‘Nineteen’, very good


  12. matthewusit | Profile

    puzzle is right, the total is nineteen


  13. Yehuda Groden | Profile

    one
    nine
    one
    eight +
    —–
    nineteen


  14. hawleyj | Profile

    Turn the page over. Eight plus one plus nine plus one equals nineteen


  15. aishusathyakumar | Profile

    i was known the ansr seeing the cmmnts.so tricky


  16. aishusathyakumar | Profile

    i was known the ansr seeing the cmmnts.so tricky :agape 8-} B-)


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