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Genius Logic

Posted by JG on June 8, 2011 – 4:48 pm

Al Gibra wants to attend a meeting of the super-exclusive Mathematical Geniuses Club, but he doesn’t know the secret password that would get him past the bouncer, who looks like a really buff Albert Einstein. Al decided to hide behind some bushes and see if he could figure out the secret admission code. A wild-haired man approached the door. The doorman said, “What is the square root of sixteen?” “Seven,” replied the man, and the bouncer let him in. Al was confused. How could a genius give the wrong answer and still get in? A man in a white lab coat was next. The doorman asked him, “Seven goes into seven hundred how many times?” “Eight,” replied the man, and the doorman let him in. Al was shocked. A woman carrying a tiny computer walked up. The doorman said, “Two plus two.” “Three,” replied the woman,, and the doorman let her in. The meeting was about to start, and Al still didnt know the code. He decided to take a chance and walked up to the door. The doorman said, “Five squared.” Al replied, “Twenty-five.” “Wrong!” yelled the doorman and shooed Al away. What answer should Al have given that would have allowed him admittance in the Mathematical Geniuses Club?


This post is under “Tom” and has 31 respond so far.
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31 Responds so far- Add one»

  1. 1. Eketahuna Said:

    He should have answered “two” – I’ll tell you why later, to give others a chance

  2. 2. meh Said:

    the answer doesnt have to do with the equation. its 2

  3. 3. meee Said:

    yup answer is 2…hint….it has nothing to do with math

  4. 4. SP Said:

    Agreed.

  5. 5. BearSprite Said:

    Funny. This is a problem with multiple possible answers. I agree that the proper answer is 2, however you could also quite reasonably arrive at 6. If the answer has to be one higher than the highest digit in the question, then all the previous answers are still correct.

    Other possible “math” questions with this formula:
    What is the square root of 173? (8)
    What is 2 factorial? (3)
    What is 94 minus 35? (10 or 0)

    This is one of those riddles that seems to have more patterns than one that qualify as possible answers.

  6. 6. BearSprite Said:

    And since somebody will have to explain the answer, the typical pattern depends on the number of words in the question.

  7. 7. john24 Said:

    The answer is 2.

    What is 15 divided by 3? 6
    What is 6 minus 5? 5
    How many moons does Jupiter have? 6

  8. 8. Akhila Pabbaraju Said:

    No, It’s actually 6, as all the answers which were told are the next consecutive no. of the no. on which the operation was performed.

  9. 9. Duo Said:

    the answer is TWO(2) ^_^

  10. 10. Danny Said:

    Yeah the answer is 2 , scroll a bit to see why!

    ¡¡ the password is the number of the words from the question !!

  11. 11. lskdfjd lskjdf Said:

    The answer should be 6

  12. 12. MUTHU KALEESWARAN Said:

    The answer is TWO. Since they should tell the number of words said by the gate keeper, as the passcode.

  13. 13. JG Said:

    Akhila and lskdfjd please explain your answer with a little bit more detail. The actual answer was two, but I want to see the logic behind your answer.

  14. 14. BearSprite Said:

    Just a reminder, this puzzle might as well be correctly solved so long as all the questions in the original post qualify with your formula. Therefore, both 2 and 6 fit.

    In a real life situation, of course, the Mathematical Genius Club will have a predetermined code – a single formula with which to solve the puzzle. There would be only one right answer. However, from the post, there is no way to determine what that is save with the sample questions. Had Al Gibra used either 2 or 6 (provided these are the only 2 answers), he would only have a 50% chance of getting in.

    However, we, of ToM, can use the logic based on the wording of the question, and can come up with any number of right answers based the original post.

  15. 15. Michelle B Said:

    2 they are counting words not numbers

  16. 16. sandhipv Said:

    NINE

  17. 17. Eketahuna Said:

    Sorry, but I can’t see how it can be Six, based on the theory that all the answers which were told are the next consecutive no. of the no. on which the operation was performed.

    For that to be the case, the first question “What is the square root of sixteen?” would not be Seven, but Seventeen.

  18. 18. alandamon Said:

    2 if you based it on the number of words the bouncer asks. 6 if we based it in the next number mentioned it each Q. e.g. 1st Q, the number is SIXteen. Answer is 7. 2ns Q, the number said is SEVEN. Answer is 8. 3rd Q, number is 2. Answer is 3. 4th Q, the number is FIVE, so the answer should be 6. TY

  19. 19. Eketahuna Said:

    So why take of the teen part off sixteen ? Sixteen is a number in it’s own right. That’s somewhat manipulating things just to conform to a theory.

  20. 20. saif siddiqui Said:

    “six”

  21. 21. brackitz Said:

    Answer is 2

  22. 22. Harsha Said:

    It must be 2.

  23. 23. me Said:

    Easy. It’s two! I’ll tell ya why! It’s the number of words in the sentence! =D

  24. 24. yuvan Said:

    haha the answer is two because of the number of words the doorman said.LOL..really fun using this on my fb..haha

  25. 25. Michelle Leighton Said:

    The answer is the number of words used in the question asked, therefore the answer would be 2! I can see where some might get the answer of 6 as well though!

  26. 26. Michelle L. Said:

    The answer to the questions asked is the number of words used in the question asked by the doorman which would make the answer to the last question 2, although I can see where others would get the answer of 6!! :)

  27. 27. yasso Said:

    2.5 just guessing

  28. 28. brian Said:

    the answer is 4 because sixteen is 7 letters and two have 3 letters that’s why the answer of 5 is 4 because it have 4 letters

  29. 29. Jan Falk Said:

    Two, since the doorman used two words to his question.

  30. 30. Manoj Said:

    6 bcoz 1st he ask about 16 i.e 6 so next no is 7 that is ans the he ask abt 7 n next no is 8 that is ans simmilarly next no of 2 is 3 that is last q ans hence next no of 5 is 6 hence it must b ans

  31. 31. NIX Said:

    I arrived at 6 as well. The first person is asked a question with 16, and the answer was 7 (given that the first number in the word sixteen is 6)- the second person was asked a question with 7, and the answer was 8. The third person was asked a question with 2, and the answer was 3. So if the last person is asked a question with the number 5, then the answer was 6. If it’s assumed (by the previous questioneers) that the answer can only be of a single digit category

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