Lenny Conundrum

Every week, The Neopets Team releases a new Lenny Conundrum puzzle, and each week that puzzle gets posted on our blog. You can discuss with others the answer in the comments and come up with a solution! We also discuss the Mystery Picture Answers aswell!

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Thursday, May 24, 2012

Lenny Conundrum - Round #451



This is Plumpy. Plumpy enjoys napping, purring, and philosophy. Plumpy is as old as he is white. One time, Plumpy rolled over onto his back, but that was just the once. The last time Plumpy was professionally weighed at a PPL centre, the scale was off by 12 pounds but he hadn't actually lost any weight. Sometimes he flaps his wings, but nothing happens. If he were a perfect sphere, he'd have a radius of 10. 10 what, we don't know. If you took 20 and then added half his weight, that's how much he actually weighs. It's hard to give Plumpy a bath because he's never dirty. Sometimes Plumpy turns to snow for no reason. If you give him some clay, Plumpy would stare at it. Plumpy's favourite food is bacon.



I love Plumpy.




What did the scale read at Plumpy's last PPL visit? Enter an integer.

89 comments :

  1. I think the answer is 28.

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  2. nedd anwsers please have no idea

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  3. How do you get 28? Just wondering.

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  4. Replies
    1. They never said that 20 was the original weight. 20 just represents a number in the equation that they gave us. It's not his actual true weight. It also says that he did not lose any weight so the scale appeared 12 LESS than what he actually was. His true weight is half of his weight plus twenty so

      20 + 1/2x = x

      therefore, x=40. That is his true weight. And since the scale weight appeared 12 LESS than his true weight so, 40-12 = 28. The answer is 28.

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    2. How did you get x=40, you did not show any mathematical proof that it is 40.

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    3. You get x=40 by minusing off 1/2x from both sides.
      So 20 = 1/2x.
      Then multiply 2 on both sides and you get x=40.

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  5. no more ideas?

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  6. well, it says adding 20 to half his weight is his weight, so he must weigh 40. the scale is off by 12 and it implies that it showed he lost weight, so 40-12=28

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  7. it's 32 or 12?

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  8. why is it 20 +12?

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  9. 20 + 1/2x = x - 12 :)
    Nice to know one for a change.

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    Replies
    1. oh man, you were so close; you got your placement a little wrong.

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    2. Problem... there is supposed to be 2 variables, not one XD One is its "weigh" and the other one is it's "actual weight" O.o

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  10. so you are saying that the awnser is 32 right?

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  11. answer is 32!

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  12. All right thanks !

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  13. (((3/4)*pi*10^3)/2)+20+12)

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  14. Answer is 28 :D

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  15. So what are we saying the answer is?

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  16. 28 or 32?!?!

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  17. 52? Where did that come from?

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  18. 28. I think the whole radius thing is to throw you off.
    lba=lb(actual)
    lbs=lb(scale)

    lba=lbs+12
    20+(lbs)/2=lba

    20+(lbs/2)=lbs+12
    40+lbs=2lbs+24
    lbs=16
    lba=28

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    Replies
    1. I'm suprised that your math wasnt correct even though I tried myself, the answer is 27...

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    2. That's because you're wrong.

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  19. not sure if im correct
    radius is redundant because can't find density to find mass?
    scale = x - 12
    actual = 20 + x/2

    20 + x/2 -12 = x - 12
    8 + x/2 = x - 12
    -x/2 = -20
    x = 40

    read on scale 40 - 12 = 28?

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  20. I think I'll be going with 28. Thanks!

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  21. How do you know it's -12 and not +12? It doesn't say in which direction the scale is off.

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    1. it didnt lose any weight.

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    2. It said that he hadn't lost any weight, which implies that it was lower than his actual weight.

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  22. Fuck these ambiguously worded problems.
    Is simply 40 not the answer?
    "If you took 20 and then added half his weight, that's how much he ACTUALLY weighs."
    If it's how much he actually weighs, is there any need to factor in the 12 pound difference?

    Thinking about it differently made me think it may be something like 20+.5(x-12)=x.

    And who's to say the 20 is even in pounds? They just got done saying "10 what."

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    Replies
    1. Scratch 40 being the answer, didn't read what it was asking properly.
      Going by my second idea, 28 would be his real weight but it's asking what the scale read during his last PPL visit, so 16?
      This is so dumb.

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  23. LOL this is making us do math! XD

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  24. This comment has been removed by the author.

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  25. [quote]What did the scale read at Enter an integer[/quote]

    -12

    There is no way to calculate his "actual weight" from the information they provided, and the question is not what did Plumpy weigh. The question is [bold]What did the scale read at Plumpy's last PPL visit?[/bold]

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  26. "took 20 and then added half his weight, that's how much he actually weighs" so that means 20 is the "other half of his weight". His total weight is 40. with the scale off by 12, so 40-12=28

    That's what I submitted

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    Replies
    1. You have to figure out the weight...20 is NOT half the weight.

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    2. Yes it is...If half his weight+20 is his actual weight, then 20 is half his weight.

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  27. Holy fuc* XD This is not just Math, but it's also science and its formulas X_X Density = Mass(Weight)/Volume(of a Sphere)...
    Sh*t just got real O_o

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  28. We need to know the density in order to find the Weight. Even if they only gave us volume T.T

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  29. Okay.

    x = true weight
    y = weight on the scale

    "the scale was off by 12 pounds but he hadn't actually lost any weight."
    y = x - 12

    "If you took 20 and then added half his weight, that's how much he actually weighs."
    Assuming that "half his weight" refers to the weight on the scale, as that's the only way it makes sense:
    20 + .5y = x

    You can't solve for two variables, but you can write y in terms of x from the y = x - 12 equation.
    20 + .5(x - 12) = x

    Distribute the .5
    20 + .5x - 6 = x

    Move the .5x to the other side of the equation by subtracting it from both sides.
    20 - 6 = x - .5x

    Simplify both sides.
    14 = .5x

    And then isolate the x by multiplying both sides by 2
    28 = x

    He weighs 28 pounds in actuality, but the question asks for the weight on the scale.

    y = x - 12
    y = 28 - 12
    y = 16

    So the answer is 16 pounds.

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    Replies
    1. Although now I'm reading it again and am crisisng over the "20 plus half his weight is how much he weighs so that means he weighs 40 pounds so the answer is 28" camp.

      Sigh.

      The wording in the problem is really confusing. I just assumed that weight vs. actually weighs was them trying to say scale weight vs. actual weight. I dunno.

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    2. Apparently you got the right answer... :)

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  30. No... I think the first one was right xD

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  31. i thinks its 20 8 its adding and subtracting from left to right so 20-12= 8 8+10=18+10=28 so 28

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  32. i mean 28 thats last comment was supposed to say 28

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  33. the answer is 16

    20 + 1/2x = x - 12
    20 + 12 = x - 1/2x
    32 = x - 1/2x
    32/2 = x
    16 = x

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  34. You guys are overcomplicating this. Give the problem to a kid that doesn't know anything about algebra, and he'll give you the right answer. it's just a matter of reading the question properly and doing some simple maths.

    a) What did the scale read at P's last PPL visit?

    b) Last time he was weighed at PPL, the scale was off by 12 by he hadn't actually lost weight (okay, so it was DOWN by 12 pounds, you have to minus 12 pounds from his real weight)

    c) his real weight is "If you take 20 and add half his weight, that's how much he actually weighs". You can just substitute numbers until you get it correct, but if you look at that question you can see that 20 must be half his weight so that 20 + half his weight = his real weight. For those of you that must have algebra, x = real weight

    20 + 1/2x = x
    20 = x - 1/2 x

    x - 1/2x = 1/2 x THEREFORE

    20 = 1/2x

    OR

    40 = x

    d) 40 - 12 = 28. That's what the scale read.

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    Replies
    1. You certainly talk big for someone who got the incorrect answer. You're treating the scale weight and real weight as the same variable. If you did it correctly, it is 20+0.5(scale weight)=(real weight). And that real weight=scale weight+12. The actual weight is 28, but the scale weight is 16, which is the answer.

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    2. If you took 20 and then added half his weight, that's how much he actually weighs. This sentence is clearly talking about actual weight, not scale weight. It is not 20 + 1/2 scale = actual. It is 20 + 1/2 actual weight =actual weight. 20 must be half, and the other half must also be 20. So actual weight is 40. Now. if the scale was off by 12 pounds but he hadn't actually lost any weight, the scale must be twelve pounds shy of the actual weight. So 40 - 12 = 28. 28 is the answer, and you talk a big game for someone who came up with a ridiculous answer.

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  35. it is 16,no doubt

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    1. Inserting doubt now.

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  36. Guys it's not 16, whoever is saying 16 is missing a vital piece of information!!!!!!!!!!

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  37. 28

    THE ANSWER IS 28

    I love all your math, and some of you seem to come to the right conclusion, good for most of you, but it isn't that complex. 20 plus half. Two halves make a whole. So, 20 must be half, and forty is the actual weight, easy. Now the scale was -12 pounds, so the answer is 28. It is super simple, and anyone who says anything other than 28 is just trying to confuse everyone out here who is not so good at math, or just not as good at math as they think. Just enter the number (integer) 28 just like that no equation no equals signs no number signs just the number 28
    No punctuation either.

    To recap.
    THE ANSWER IS 28

    28

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  38. I said 165 because his radius is 10... so i did his area... halfed it, then added twenty and subtracted 12. I suppose I'm wrong though

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    1. You are wrong on so many levels.

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  39. It's clearly 16, you guys must have made a big mistake.

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    1. Clearly - you are the biggest bug eyed bottle nosed person on this planet...how is this CLEAR - blow me

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  40. It's 28 or 16.
    PICK YOUR POISON.

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  41. PPL weight x = w-12
    equation given is 20+0.5x=w
    therefore 20 + 0.5(w-12)=w

    20 +0.5w -6 -w = 0
    14 - 0.5w=0
    w=28

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  42. The debate all boils down to the sentence: "If you took 20 and then added half his weight, that's how much he actually weighs," specifically the part reading "half his weight." This is not clear if this is his real weight for his weight on the scale reading.

    If it refers to his real weight:
    20+x/2 = x, so x=40. Thus the scale would read 40-12 = 28.
    If it refers to the scale reading:
    20+(x-12)/2 = x, so x = 28. Thus the scale would read 28 - 12 =16.

    So both answers appear to be valid based on how the question is interpreted and this is why we have these two being argued so much.

    That being said, I believe the answer is 28, as the first interpretation seems more correct to me. In general, "weight" probably refers to his real weight. If they were referring to the reading on the scale, they probably would have said "If you took 20 and then added half the scale reading at his last visit, that's how much he actually weighs." Can anybody give a conclusive reason why "weight" might refer to what the scale said? Because that is in no way is his "weight"; it is an incorrect measurement. I think people might be getting thrown off by the way the sentence reads "how much he actually weighs," but this doesn't mean the first "weight" isn't how much he actually weighs either.

    TLDR: There are 2 interpretations that are being argued that give answers of 16 and 28. I think the answer is 28.

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    Replies
    1. http://www.neopets.com/games/conundrum_feature.phtml?round=2

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    2. Lenny Conundrum Round 2
      A Skeith weighs 100 pounds plus half of his weight. How much does he weigh?
      Answer: 200 pounds

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  43. I am a complete and total MORON so I have decided to go with 16.

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  44. Answer is 28 or 52. To read that sentence as suggesting anything other than his real weight being 40 is to misunderstand it.

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  45. If you do the algebra, the answer is 16. There is no indication in the question that 20 is half the actual weight so why people are saying his actual weight is 40 I don't understand. The only factor about the 20 is that you ADD it to the actual weight, which you must use algebra to figure out. Using the equation of "20 + 1/2x = x - 12" you get the answer of 16, so the PPL weight is 16.

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    1. You suck at algebra. 1/2x would be actual weight, and x-12 would be his weight on the scales. So your equation doesn't make any sense. Didn't you math teacher ever tell you that you can't divide apple by oranges?

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  46. 16 asshole.i give this question to my sister and she is a math teacher and she told me that the answer is 16.if the answer is 16,i will rub the answer inside your butt while having sex with your daughter

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    1. I love your spunk...call me...

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    2. "If you took 20 and then added half his weight, that's how much he actually weighs."

      The problem lies in the ambiguity of the terms. If I hop on a scale that says 88lbs, wherein actual fact I weigh 100lbs, my weight is 100lb regardless of what the scale says. You shouldn't factor the weight shown on the scales into the initial calculation, purely because doesn't influence his weight at all (it simply reports on it).

      Therefore if we take w to be his weight, then it's quite easy to show that:
      20 + w/2 = w
      Therefore w = 40

      Once we calculate his weight, we can then give the answer in the format they're after (and it's now we bring the scales in to account). It implies that a smaller weight was shown on the scales than his actual weight, so logically you should subtract 12 from 40.

      This is kindergarden maths, the only issues arise from the phrasing. So whether or not your sister is a math teacher holds little significance, as Mathematical ability shouldn't factor at all in this. To me, what I've written above makes logical sense. If another method makes more sense, use it.

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    3. Can I do your sister? I like the dumb ones, they are frisky.

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  47. +28. Its an integer. 28 is an integer. The negative sign is necessary, a number without a sign is always postive

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  48. 16 asshole.i give this question to my sister and she is a math teacher and she told me that the answer is 16.if the answer is 16,i will rub the answer inside your butt while having sex with your daughter

    Well apparently your sister sucks at her job, among other things

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  49. Is this petpet the planet or on the space station or kreludor? That should make a difference. W=mg

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  50. Let a represent his actual weight.
    Let s represent the scale reading.

    a - 12 = s
    20 + a / 2 = a

    40 + a = 2a
    a = 40

    40 - 12 = s
    s = 28

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    Replies
    1. Yay math! you should also have told the dopes on here what you were doing on each step. For example, step one get rid of the fraction by multiplying both sides by 2; step 2 divide both sides by a. Then maybe they would understand the math. Good work by the way.

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  51. you guys are way over thinking this. the answer is 16, and I'm only a 5th grader.

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  52. Well I am smarter than a fifth grader and the answer is 28 !!! Now stop the madness assholes !!!

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  53. its 28 IM A A 5TH GRADER GOING INTO 6TH GRADE SO I KNOW WHAT IM TALKING ABOUT DID YOU TEACHER TELL U ITS ADDITION AND SUBTRACTION FROM LEFT TO RIGHT AND MULTIPLICATION FROMM LEFT TO RIGHT DUMASSES ITS 28! I DID IT ON A CALCULATOR MY PHONE AND I DID IT ON OUR WHITE BOARD AT SCHOOL BECUS THIS WAS ONE OF OUR PROBLEMS IN CLASS!

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  54. Do they teach grammar, punctuation, and correct spelling in the 5th grade or are you in the "special" class ???

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  55. I can't read a simple problem and do simple math. I like to over-complicate things and say stupid stuff, that is why I am going with 16. If you are at least half as dumb as me you will answer 16 as well. Idiots of the world unite! Go with 16! Let everyone else get the prize NP, the more of us suckers that say 16 the more the smart-guys get. I say let them have it.

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  56. Well I answered 28 and I got the prize and trohpy so there you have it. The round has been judged.

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  57. I'm in a 5th grade special class. for gifted people. as in, I'm doing 8th grade work. :P

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  58. I find it really funny that the right answer was posted and proved in about 10 comments, but people argued it for 77 more.

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  59. Congratulations! You have guessed correctly in the Lenny Conundrum game (round 454). It wasn't a guess! I was right and all your idiots that kept saying 16 after we all proved you mathematically wrong can suck it! Owned all you losers!

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