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Australian Air Force's Recruiting Puzzle Shown To Be Unsolvable

KernelMuncher writes "Australia's Royal Air Force has been left red-faced after a job ad asked applicants to solve a complex math problem that was revealed to be unsolvable. The service posted the puzzle in a bid to attract the country's best minds to its ranks. 'If you have what it takes to be an engineer in the Air Force call the number below,' it read, above a complicated formula which candidates had to crack. But there was a slight difficulty: The problem had typos and ended up not giving potential operatives the correct contact information."

64 of 113 comments (clear)

  1. I know where they got the idea by cold+fjord · · Score: 5, Funny
    --
    much of left-wing thought is a kind of playing with fire by people who don't even know that fire is hot - George Orwell
    1. Re:I know where they got the idea by auric_dude · · Score: 1

      We need you for a new recruit https://www.youtube.com/watch?v=InBXu-iY7cw well it worked for the navy.

    2. Re:I know where they got the idea by bkmoore · · Score: 4, Funny

      I prefer the Muppets version. It almost makes one want to sack France.

  2. It's the Kobayashi Maru! by Anonymous Coward · · Score: 5, Funny

    It's the Kobayashi Maru!

    1. Re:It's the Kobayashi Maru! by sigxcpu · · Score: 1

      It was designed to be solved by people down under.
      you are holding it upside-down.

      --
      As of Postgres v6.2, time travel is no longer supported.
  3. You're in the army now by HeadOffice · · Score: 5, Funny

    When people pointed out two key typos, the military bosses thanked them and said they were 'exactly the kind of people they are looking for.'

    "Eh, sarge, I think this war is a mistake..."

    1. Re:You're in the army now by Joe_Dragon · · Score: 1

      well you signed a 4+ year commit so keep in the way or face an dishonorable discharge.

    2. Re:You're in the army now by Bearhouse · · Score: 1

      When people pointed out two key typos, the military bosses thanked them and said they were 'exactly the kind of people they are looking for.

      And the people were from Reddit...yeah, exactly the kind of people you should be looking for!

    3. Re:You're in the army now by HJED · · Score: 1

      Parent and OP are talking about RAAF which is Australian. The commitment is four years, unless you do a degree at ADFA in which case you are required to serve the length of your degree after you graduate.

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    4. Re:You're in the army now by rtb61 · · Score: 1

      Now if they has typed it in correctly, they would only have had the add in the papers they had paid for and only for the number of times they had paid for it. By making the error, that add has now gone global and. appeared many more times than they had paid for. Not to forget there are certain countries around the world from whose citizens the Royal Australian Air Force will accept applications.

      --
      Chaos - everything, everywhere, everywhen
  4. Reminds me of high school by Anonymous Coward · · Score: 1

    My AP Statistics teacher used to say the best part about advanced math equations is that you can say (and prove!) there isn't an answer.

    1. Re:Reminds me of high school by Anonymous Coward · · Score: 5, Funny

      One thing I love about fresh water school of economics, not only do they claim they can write an equation describing a modern industrial economy, but solve it too.

  5. If you can solve the un-solvable... by anyaristow · · Score: 5, Funny

    ...and contact us at our secret phone number, we *really* want you.

    1. Re:If you can solve the un-solvable... by PolygamousRanchKid+ · · Score: 2

      . . . and I was thinking that they were looking for someone for Australia's Area 51, someone whose father was an alien, who met a lovely, lonely Australian girl on a brief stopover on his travels through the cosomos, with alien math problem solving ability, who can fly the spaceships buried by the Aborigines during The Dreamtime, etc . . .

      . . . does Australia have an Area 51 . . . and will iMaps take you there . . . ?

      --
      Schroedinger's Brexit: The UK is both in and out of the EU at the same time!
    2. Re:If you can solve the un-solvable... by speederaser · · Score: 1

      ..does Australia have an Area 51..

      The answer appears to be yes:
      http://www.bibliotecapleyades.net/esp_sociopol_pinegap.htm

      I'm not Australian so it's the first I've heard of it.

    3. Re:If you can solve the un-solvable... by auric_dude · · Score: 1

      We *really* want you, 'cos we cant afford one of those D-Wave Systems.

    4. Re:If you can solve the un-solvable... by Darinbob · · Score: 1

      Never mind, if you're the right sort of candidate, the government already has been monitoring you and will be in contact shortly.

    5. Re:If you can solve the un-solvable... by Wild+Wizard · · Score: 1

      Wrong base

      UFO's are here :- http://goo.gl/maps/1gSWW

  6. Employment Agencies? by BoRegardless · · Score: 1

    My guess is they will find good people for less cost than the government program/s.

  7. How they found out... by Anonymous Coward · · Score: 5, Funny

    Several potential recruits complained after getting error messages from the Wolfram web page that reduces integrals.

  8. To: Royal Australian Air Force Recruiting Command by cold+fjord · · Score: 5, Funny

    Your problem may be solved by means of a most ingenious proof I have, which the margin of your ad is too small to contain.

    I have to go lie down now, I'm not feeling well.

    --
    much of left-wing thought is a kind of playing with fire by people who don't even know that fire is hot - George Orwell
  9. Metaproblem by gmuslera · · Score: 2

    You find out that they are mistaken. So, you don't solve it, do a fake solving, or report them that they made a mistake? Considering how they approach to vulnerability reports the last option could get you in prison, while the problem will still have the same mistake.

  10. Maybe they're actually looking.... by Anonymous Coward · · Score: 1

    ...for people who can bullshit their way thru impossible circumstances, and are trying to seek out whoever is the most convincing bullshitters.

  11. It was solvable by Hentes · · Score: 2

    It was solvable, just the solution wasn't the intended phone number.

    1. Re:It was solvable by stewsters · · Score: 2

      I think they were looking for an answer in the form of:

      for(PhoneNumber number : allPhoneNumbers){
      if (satisfies equation){
      autodial from google voice
      }
      }

    2. Re:It was solvable by Hentes · · Score: 1

      I guess it depends on your definition of solution. If it contained an integral that can't be expressed in a closed form, I would call that unsolvable.

    3. Re:It was solvable by lxs · · Score: 2

      Ghostbusters!!!

    4. Re:It was solvable by EuclideanSilence · · Score: 1

      I think the free variables for all the trig functions are supposed to cancel out, like sin(x)^2 + cos(x)^2 cancelling to become 1.

    5. Re:It was solvable by RivenAleem · · Score: 1

      Fuck me, that explains all those calls!

  12. A strange game ... by BenBoy · · Score: 4, Funny

    ... the only winning move is not to play.

  13. They only think it is impssible to solve by gsgriffin · · Score: 2

    You just need a cocky young man that can reprogram the test and then casually win the test while eating an apple.

    --
    jsut athnoer menagiensls ltitle psrhae for you to dcoede. Why do we wtsae our tmie dnoig tihs?
  14. Wrong demographic by mark-t · · Score: 1

    Typos in the problem aside, most engineers I know wouldn't have either the inclination or ability solve that kind of problem. The reactions to it would vary from x "I forgot that shit as soon as I graduated".to a full blown "wtf".

    And between both my wifes job and my own, we actually know actually quite a lot of engineers.

    That is clearly a problem for mathematicians, not engineers.

    1. Re:Wrong demographic by Hentes · · Score: 2

      Mathematicians don't bother with such low-level expressions. This is indeed a problem for engineers. A good engineer would know how to load the problem into Matlab (or whatever symbolic solver engineers use), and lean back while it computes the answer.

    2. Re:Wrong demographic by imjustmatthew · · Score: 2

      A good engineer would know how to load the problem into Matlab (or whatever symbolic solver engineers use), and lean back while it computes the answer.

      This. Most of what I'll -- for lack of a better term -- call applications engineering is done this way. You learn the math in high school and college so you understand the problems, not so you can solve them in your head. Even in research fields it's unusual to solve equations of this size by hand.

    3. Re:Wrong demographic by mark-t · · Score: 1

      I could test my theory after this weekend and see if any of the ones I know from work would have shown any interest in taking a serious stab at this kind of problem, but the image is too blurry to be useful. I can still recognize the symbols that are there, like integration and summation, but the actual values and limits associated with them are illegible.

  15. Is there a version that isn't blurry? by mark-t · · Score: 1

    [nt]

  16. Obviously they need brighter people by gweihir · · Score: 2

    And in particular people that know the limits of their own skill. Dunning-Kruger effect at work. People that know the limits of their own skill get help when faced with something beyond them. People that do not know these limits mess it up.

    --
    Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
    1. Re:Obviously they need brighter people by Anonymous Coward · · Score: 3, Funny

      And in particular people that know the limits of their own skill. Dunning-Kruger effect at work. People that know the limits of their own skill get help when faced with something beyond them. People that do not know these limits mess it up.

      Or, the put things a little differently, perception of ability approaches infinity as actual ability approaches zero.

      There's no excuse for not knowing your limits. That's why L'Hôpital's Rule was invented.

    2. Re:Obviously they need brighter people by gdeles · · Score: 3, Insightful

      A wise person knows what they do not know. I used to interview entry level programmers. I would ask harder SQL questions until they could not provide a good answer. Usually "what is a left outer join". The best non answer was "I am not sure, it is similar to this, and I know were to look it up". The worst answer (in a valley girl voice). "It is like a regular join, except like outer.".

    3. Re:Obviously they need brighter people by gweihir · · Score: 2

      Indeed. Good test. In this day and age, you cannot know everything, and how you deal with not knowing becomes critical for actual ability to solve problems.

      --
      Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
    4. Re:Obviously they need brighter people by gweihir · · Score: 1

      Most: never. Most that have it have it from the start. A very small group learns it at some indefinite time in their lives.

      --
      Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
    5. Re:Obviously they need brighter people by MaXiMiUS · · Score: 1

      I'd think the correct answer would be the best answer. Does this really qualify as a harder SQL question? I know what a left outer join is just from stuff I've done in my free time.

      --
      It's never just a game when you're winning. - George Carlin
    6. Re:Obviously they need brighter people by TapeCutter · · Score: 2

      I've used the same technique myself, it's a very effective way to screen out bullshitters.

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    7. Re:Obviously they need brighter people by TapeCutter · · Score: 1

      It's a personality test not a technical test, the technically correct answer tells the interviewer nothing about the person's character. The SQL question is just an example of a point where a bullshitter would likely start trying to fake their level of knowledge. It's not hard to do if the interviewer knows the subject, simply keep thinking up questions based on trivial information you have had to look up in the recent past. I've used the same technique in the past when hiring C programmers. Most times it takes less than five minutes to find some esoteric trivia that the prospect does not know off the top off their head, how they handle not knowing will clearly separate the confident (and knowledgeable) professional from the cowboys.

      Also get it done early in the interview, no good wasting everyone's time if they fail the "arrogance test".

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    8. Re:Obviously they need brighter people by TapeCutter · · Score: 1

      Age? - Wisdom emerges from experience, experience is whatever fails to kill you.

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    9. Re:Obviously they need brighter people by arth1 · · Score: 1

      Yes, that it's "left outer join" here is not what's of value. It's how the applicant answers when faced with something he doesn't know, which might or might not be valuable to the employer. You could ask what the benefit of an orcish maneuver is, or when Goroud shading is preferable to Phong shading, or a boatload of other things. The point is to stump them, but not come across as bullshitting them.

    10. Re:Obviously they need brighter people by gweihir · · Score: 1

      I call this "failure of the second order", i.e. not being able to deal with ordinary failure. A competent professional will say "I don't know. I would find out in the following way." They also may have some suspicion what it is, but will confirm that before acting on it. The cretins will lie, fantasize, improvise something at least partially broken or be wrong without knowing it. There is indeed zero value in continuing to talk to these.

      I think I failed a job interview at Google some years back because I actually did know all the stuff they were asking me and had hands-on experience with many topics, giving them nothing to latch on to. And since the interviewers there cannot ask their own questions (they were given the questions by some automated system), the interview failed and they put my application on hold. Then, a year later, they asked me for a re-interview. At that time I had a job I liked and told them that they had one chance to hire me and they blew it. Quite satisfying, especially because when interviewing the first time, I really needed that job. And I know that they really needed people like me at that time (from inside contacts). Arrogance cuts both ways.

      --
      Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
    11. Re:Obviously they need brighter people by gweihir · · Score: 1

      I used to believe that. Now, I don't think so anymore. Some people seem to be born with the ability to realistically see themselves, and they do get better with experience. But they already start out with some skill in this area and the potential to acquire more. However, most people are not born with this skill and never acquire it. Some of these without manage to find out that they have this deficiency, but that seems to be the maximum possible. I also do not believe anymore that it can be taught. It can be made an important selection criterion, for example in a good academic engineering curriculum. Those that do not have the capability for realistic self-evaluation will reliably fail in these courses. Unfortunately, at least in IT, there are not many good academic engineering curricula around. Nowadays many are just geared to producing as many "engineers" as possible, which then proceed to do more harm than good.

      --
      Most ACs are not even worth the keystrokes to insult them. Be generically insulted by this and ignored otherwise.
  17. Re:and the prize is? by hawguy · · Score: 2

    WTF does Australia do with its Air Force anyway? They're hopefully not teaching algebra.

    Apparently they don't have to teach algebra since they seem to be looking for candidates that already know Algebra and Calculus.

  18. My guess for the answer by Anonymous Coward · · Score: 1

    42

  19. Facebook... by Macchendra · · Score: 1

    :-> Maybe they were just trying to facebook comment bait. You know, like those "95% of people get this wrong." posts, lol.

  20. Actually: by Hartree · · Score: 2

    They were looking for someone with enough common sense to not bother solving it and just look up the recruiter's number in the phone book or on the web.

    1. Re:Actually: by The+Dark · · Score: 1

      Or possibly someone with enough common sense to just call the only number in the equation that looks like a phone number - 131901
      It does say "call the number below", not solve the equation.

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      sig's not here
    2. Re:Actually: by Wild+Wizard · · Score: 1

      After reading the article (yes I did) it would seem that the phone number was the solution to the equation but due to 2 typos on the last 2 lines it didn't work properly.

      If you ignored the last 2 lines on the original then you would have still got the number as the last 2 were supposed to solve as 0.

      Though if you need to solve the equation to get the number then they probably want you in intelligence anyway as anyone else would have known what it was due to it been advertised everywhere for years now.

  21. This is what happens by pieisgood · · Score: 1

    This is what happens when you have engineers attempting calculus without mathematicians around.

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    Eat sleep die
  22. Re: This is why by sr180 · · Score: 1

    Its an even bigger issue here known as 457 visas. Even the government knows they are being widely abused however the opposition likes the status quo. Supposedly its only for job types that people are in short supply how ever almost every job you can think of is on the 457 pre approved list.

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    In Soviet Russia the insensitive clod is YOU!
  23. No wonder.... by countach · · Score: 3, Funny

    No wonder I kept getting a Chinese take out joint.

  24. Re: This is why by FirephoxRising · · Score: 1

    457 is just our H1B, plenty of people want the jobs, even in remote areas, but 457s are cheaper, so they make it artificially hard/unattractive to Australians, then say they cant find people and use 457s.....

  25. Re:Typical military arrogance by HJED · · Score: 1

    Looking at it briefly all of the calculus for this appears to be covered in the NSW Curriculum Maths Extension 1 course, although an average students doing that course would not be required to solve a problem of that length.
    Certainly if it is not solvable using what's taught in Maths Extension 1, it is certainly solvable for Maths Extension 2 students. For reference if you are doing a maths or computing degree in Australia most universities require you to have completed at least extension 1 maths (or equivalent in another state) in High School.

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  26. Re:Why does Australia have an army? by HJED · · Score: 1

    [citation needed]

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  27. How hard is it to "solve" an algorithm, anyway? by davide+marney · · Score: 1

    IANA Mathematician, but all those big hairy equations just look like code to me. Doesn't "solve" just mean "to compute", i.e., you read the symbols, do what they tell you, wash, rinse, repeat? If I gave someone a function that executed some huge, gnarly block of code and then asked them to tell me what it would return, what would that really tell me? That they know how to read? Third graders know how to read.

    And what kind of person, exactly, would such a test attract? Puzzle-solvers, people in love with unnecessarily complex, convoluted algorithms. The kind of people who would write unnecessarily complex, convoluted algorithms.

    No thanks. Give me a Feynman any day.

    --
    "We receive as friendly that which agrees with, we resist with dislike that which opposes us" - Faraday
    1. Re:How hard is it to "solve" an algorithm, anyway? by EuclideanSilence · · Score: 1

      This particular equation is not directly computable. It requires knowing things like how to close infinite sums, and how to ignore bad choices of parenthesis of the poor guy who had to come up with it. Maybe they didn't tell him it was going to be advertised.

      It's an equation that looks hard, but is actually really really simple, which will actually attract the kind of people that militaries want. They want someone who can be made to be full of himself without ever actually considering the value of his choices or actions. Anyone with a competent level of skill in mathematics would not even consider the formula worth finishing (unless they were actually curious about the phone number itself).

      Someone who doesn't get taken in with the self absorbed "I am great" feeling, but instead says "hmm this isn't actually all that great" is dangerous. Example: Snowden.

  28. Re:Perhaps that WAS the intent by LandGator · · Score: 1

    Heinlein wrote about that in the 40s (SPACE CADET). A logic problem was presented to the candidate who had the opportunity to cheat.

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  29. Backup? by CHIT2ME · · Score: 1

    I have two nephews who fly for the U.S. Air Force. Hope they never need backup from the Aussies!!!

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