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Thread: The Japanese IQ Test

  1. #11
    Emperor/Dictator Array kyuuei's Avatar
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    Eff all ya'll geniuses. It took me a forever to figure out. What an inefficient system, I'd make their asses swim.
    Kantgirl: Just say "I'm feminine and I'll punch anyone who says otherwise!"
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  2. #12

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    Nice one. I wonder how the fuck does a parent beat a child up while there's a policeman standing two steps away, but that's another story...

  3. #13
    Senior Member Array NewEra's Avatar
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    Quote Originally Posted by kyuuei View Post
    I think I played and clicked on it like 400 times
    To avoid this, I just looked at your answer after 10 minutes, lol.

  4. #14
    Emperor/Dictator Array kyuuei's Avatar
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    Good choice, Chosen one. If I were a bit smarter I'd of just consulted the internetz for the answer!
    Kantgirl: Just say "I'm feminine and I'll punch anyone who says otherwise!"
    Halla74: Think your way through the world. Feel your way through life.

    Cimarron: maybe Prpl will be your girl-bud
    prplchknz: i don't like it

    In Search Of... ... Kiwi Sketch Art ... Dream Journal ... Kyuuei's Cook book ... Kyu's Tiny House Blog ... Minimalist Challenge ... Kyu's Savings Challenge

  5. #15
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    Quote Originally Posted by TheChosenOne View Post
    To avoid this, I just looked at your answer after 10 minutes, lol.
    Ten minutes? Sheesh. I decided they were all violent morons and closed the window in 2. :rolli: Who needs IQ anyway when you can pull the plug. I'm too impatient for things like these.

  6. #16
    Writing... Array Tamske's Avatar
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    I did it.
    I think the interesting thing is not IF you did find it, but HOW did you find it.

    Friday morning I read the riddle and played a few minutes with the application. Right away, I knew that if there was a solution, there would be two solutions. (Take one, interchange father and sons with mother and daughters and you have the second. That's symmetry.)
    I logged off because I had to prepare lessons and give a lesson. On my way to the school I thought about the riddle and after 5 minutes I found something I thought was a solution.
    Today I checked my 'solution', finding a kink in it and correcting it, finding a real solution.

    Edit: kyuuei's solution with trial-and-error is just another method. You could also make a tree of possible first steps etc...

  7. #17

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    Quote Originally Posted by Tamske View Post
    I think the interesting thing is not IF you did find it, but HOW did you find it.
    I think time matters most, just like in 'real' standardized IQ tests (except for the ones that measure the extremes, like... 150+).

  8. #18
    That chalkboard guy Array Matthew_Z's Avatar
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    I just used careful process of elimination. There wasn't much in the way of long dead ends. The rest of this post is how I worked the problem, in invisible font.

    Code:
    P1 = A parent
    p1-1 = the first same-gender child of that parent
    p1-2 = the other same-gender child
    P2 = The other parent
    p2-1 = the first same gender child
    p2-2 = the second same gender child

    C1 = Police Officer
    c1 = Criminal

    Step one:
    Neither parent can go across alone as that would lead the other parent to attack a child. If the parents go across together, they would have to return together to prevent an attack, which would lead to a useless ad infinitum. The only person capable of going across, then, is C1. Given that he cannot leave c1 with others, he must go across with c1.

    Therefore, the first step is:
    C1+c1 -->

    Step two:
    Given that he is the only one capable of operating the boat, C1 must return. Bringing the criminal back would undo the only possible progression, and thus is necessary. C1 must travel back alone.

    Therefore, the second step is
    <-- C1

    Step three:
    Given that c1 will attack anyone without the presence of C1, C1 must go. If either parent leaves, a child will be attacked. The problem with both parents leaving is the same as in step 1. C1 must leave with p1-1

    Therefore, the third step is:
    C1+p1-1 -->

    Step 4:
    As with Step 2, C1 is the only boat operator. Leaving p1-1 and c1 together is not possible, so the cop must go back with one of them. going with p1-1 would undo the last step, so he must return with c1.

    Therefore, the fourth step is:
    <-- C1+c1

    Step 5:
    If the cop were to leave, he would have to leave with the criminal, which would undo the last step. The parents still cannot leave together. As a result, one parent must leave. To prevent "child abuse," P1 must leave with p1-2.

    Therefore, the fifth step is:
    P1+p1-2 -->

    Step 6:
    The parent must return as only he can operate the boat. If the parent leaves with either child, he will negate the last step. He must proceed back alone.

    Therefore, the sixth step is:
    <-- P1

    Step 7:
    If P1 leaves alone, it will negate the last step. If P2 goes with anyone except P1, child abuse will result. If C1 goes with anyone but c1, the criminal will harm someone. If C1 goes with c1, he would have to come back the same way, which is redundant. By process of elimination, P1 must go across with P2.

    Therefore, the seventh step is:
    P1+P2 -->

    Step 8:
    The parents leaving together would undo the last step. P1 going across without P2 would result in child abuse. P2 going across alone, however, would not.

    Therefore, the eighth step is:
    <-- P2

    Step 9:
    P2 going across alone would undo the last step. P2 going across with a child would require the step to then be undone or for both parents to return together. However, if both parents then returned together, the only possible step would be C1+c1 -->, which could only then be undone. P2 cannot cross. The only other boat operator is C1, who must cross with the criminal.

    Therefore, the ninth step is:
    C1+c1 -->

    Step 10:
    If C1 goes back, he must take the criminal, which would undo the last step. P1 must go across. While P1 could carry p1-2 back with him, the step would then have to be undone or the parents would cross together, at which point the parents would then have to cross back together again to prevent child abuse. The only possible solution here is for P1 to cross alone.

    Therefore, the tenth step is:
    <-- P1

    Step 11:
    If P1 one does not leave, P2 must, which would require at least one child remain, to be abused. P1 must leave. Leaving with a child of the opposite gender would be abusive, and leaving alone would undo the last step, so P1 must cross with P2.

    Therefore, the eleventh step is:
    P1+P2 -->

    Step 12:
    C1 returning would be redundant, P1 going without P2 would be abusive. P1 going with P2 would then require P1 and P2 to cross the river again to prevent abuse, which be redundant. P2, by process of elimination, must cross. Crossing with anyone other than P1 would result in abuse or criminal attacks, so P2 must cross alone.






    Therefore, the twelfth step is:
    <-- P2

    Step 13:
    P2 returning alone would be redundant, so P2 must cross with p2-1.

    Therefore, the thirteenth step is:
    P2+p2-1 -->

    Step 14:
    If P2 goes with p2-1, the last step would be undone. If P2 goes with P1, then they must return together to prevent abuse. If P2 goes without P2, abuse results. P2 cannot cross. If P1 goes with anyone except P2, abuse also results. Only C1 can return, and they must so do with the criminal to prevent harm.

    Therefore, the fourteenth step is:
    <-- C1+c1

    Step 15:
    C1, being the only boat operator on the same side of the river, must cross. Crossing alone results in harm. Crossing with the criminal is redundant, so C1 must cross with p2-2.

    Therefore, the fifteenth step is:
    C1+p2-2 -->

    Step 16:
    If either parent goes across, child abuse results, unless P1 and P2 go together, resulting in a criminal attack. C1 must cross, and without P1 or P2. Taking a child would essentially negate the last step, so C1 must go alone.

    Therefore, the sixteenth step is:
    <-- C1

    Step 17:
    C1 going alone would negate the last step, so he must cross with c1.

    Therefore, the seventeenth and last step is:
    C1+c1 -->
    If a deaf INFP falls in the forest and no one is around to hear it, does it make a sound?

  9. #19
    Striving for balance Array Little Linguist's Avatar
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    Just think through it logically. Family has to be together, and the thief has to be with the policeman. Duh.
    If you are interested in language, words, linguistics, or foreign languages, check out my blog and read, post, and/or share.

  10. #20
    Striving for balance Array Little Linguist's Avatar
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    If you think that was hard, just see what logic puzzles await you in some books. Holy crap. Make your head hurt....With dozens of possibilities and shit if you don't use your logical faculties...Really have to concentrate.
    If you are interested in language, words, linguistics, or foreign languages, check out my blog and read, post, and/or share.

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