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Hardest Quiz On JetPunk
This is a Self-Referential Aptitude Test, developed by James Propp, at UMass-Lowell.
Each question refers to one or more answers on a different question. You should open a separate document to take notes on your process of elimination. Consider not starting the quiz until you have all of the answers.
There are hints in the comments.
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Last updated: November 11, 2023
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| First submitted | March 1, 2019 |
| Times taken | 24,831 |
| Average score | 25.0% |
| Rating | 5.00 |
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1. The first question whose answer is B is question
A) 1
B) 2
C) 3
D) 4
E) 5
2. The only two consecutive questions with identical answers are questions
A) 6 and 7
B) 7 and 8
C) 8 and 9
D) 9 and 10
E) 10 and 11
3. The number of questions with the answer E is
A) 0
B) 1
C) 2
D) 3
E) 4
4. The number of questions with the answer A is
A) 4
B) 5
C) 6
D) 7
E) 8
5. The answer to this question is the same as the answer to question
A) 1
B) 2
C) 3
D) 4
E) 5
6. The answer to question 17 is
A) C
B) D
C) E
D) none of the above
E) all of the above
7. Alphabetically, the answer to this question and the answer to the following question are
A) 4 apart
B) 3 apart
C) 2 apart
D) 1 apart
E) the same
8. The number of questions whose answers are vowels is
A) 4
B) 5
C) 6
D) 7
E) 8
9. The next question with the same answer as this one is question
A) 10
B) 11
C) 12
D) 13
E) 14
10. The answer to question 16 is
A) D
B) A
C) E
D) B
E) C
11. The number of questions preceding this one with the answer B is
A) 0
B) 1
C) 2
D) 3
E) 4
12. The number of questions whose answer is a consonant is
A) an even number
B) an odd number
C) a perfect square
D) a prime
E) divisible by 5
13. The only odd-numbered problem with answer A is
A) 9
B) 11
C) 13
D) 15
E) 17
14. The number of questions with answer D is
A) 6
B) 7
C) 8
D) 9
E) 10
15. The answer to question 12 is
A) A
B) B
C) C
D) D
E) E
16. The answer to question 10 is
A) D
B) C
C) B
D) A
E) E
17. The answer to question 6 is
A) C
B) D
C) E
D) none of the above
E) all of the above
18. The number of questions with answer A equals the number of questions with answer
A) B
B) C
C) D
D) E
E) none of the above
19. The answer to this question is:
A) A
B) B
C) C
D) D
E) E
20. "JetPunk" begins with
A) K
B) P
C) 7
D) Q
E) J
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Can you name the countries with the highest annual military spending?
There's something quite tricky about each one of these questions. Try and fail to answer them correctly.
I'm pretty sure you'll rage. Can you click every cell which an arrow points to?
Select the countries which are larger than Texas. Selecting any countries smaller than Texas will end the quiz.
This comment contains hints. Select to see them (not sure about mobile).
These are not comprehensive.
#5 and #20 can each be answered without looking at any other question
Looking at #10 and #16 will give you the answers to both.
Looking at #6 and #17 will allow you to eliminate answers from each. #2 will clarify them.
Reading #7 will eliminate answers from #8. I am not saying you will be able to answer #7.
Use #3, #4 and #8, together.
Those will also help you answer #12, #15, and #13.
Knowing #13, allows you to eliminate answers from several questions.
#2 is your friend. Consider its implications to will help you eliminate answers on many questions .
You know how many questions are on the quiz, and which ones are vowels or consonants.
I probably will put together a comprehensive solution and post it on reddit.
Only took it just now, didn't realize how fun of a 40 minutes that would be.
I got 19/20 cause I apparently can't count, but it was amazing, nonetheless!
I'm a little bitter though since I only missed #11 which threw me off when finding #14/#18/#19. I ended up using deductive reasoning to get them right anyhow, but I only got 19/20... I'm not redoing the quiz for getting a score that's 1 higher, though.
Very well done, but I can't nominate it ;)
https://www.jetpunk.com/user-quizzes/1306568/the-impossible-logic-quiz
Got it right on my second try, figuring out my solution could not work after 30 min on my first attempt must have been one of the most frustrating moments of my life :-)
"This is a Self-Referential Aptitude Test, developed by James Propp, at UMass-Lowell."
I don't believe the source describes his process, but I wonder if an internet search might uncover it.
I dig it.
I think the logic for #9 on pass three is sus -- "meaning the answer to question 11 couldn't be B". We know it is because we know the answer, but why, at the point, couldn't 11 not being B be valid? Tell me if you disagree.
Question 9 is "The next question with the same answer as this one is question," with option (B) being 11, meaning of course that if the answer is B here then the answer to Question 11 must also be B.
Question 11 is "The number of questions preceding this one with the answer B is," with option (B) being 1.
However, we already know that Question 4's answer is B, so if Question 9 is also B that would mean that there are at least 2 questions prior to 11 with the answer B.
In short: If 9 is B, it leads to a paradox where 11 must be B (because of 9's answer) and can't be B (because it's now incorrect). Thus, the answer to 9 can't be B.
Simply put, just because 9 can't be B that doesn't mean 11 can't be. (and it actually is ;) )
The idea is to read the questions and determine what conclusions you can draw about each one. As you are able to draw conclusions on each question, then conclusions about other questions become apparent (this does not necessarily happen in numerical order).
This is where keeping a separate document can be helpful to keep track of your thinking.
If you are lost, there are hints at the top of the comments to help you. If you are still not having fun, there is a video (linked at top of comments) I put together describing how I solved it.
(side note for QM: I wish there was a way to eliminate/DQ the 50 or 60 quizzes where it's obvious that many people cheat -- e.g. an obscure list of 200, where 15% of takers get 100% correct. Just sayin').
Really tricky quiz, I like the concept
I think I haven't used info contained in question+answer number 7: I only used it as a check, at the end. Is it possible that there was redundant information? (Just a question, not complaining of course!)
Guess I'll have to learn some more English before taking such a quiz again haha
finishing the quiz without outside help really feels good and satisfying, i love this quiz
5, 10, 16 and 20 are all easy, the rest? you're in for a long ride...
Edit: Looking at the spreadsheet, I realized I had it right on there and entered it wrong.
Question 12 can also be solved without needing to answer any questions.
If we look at question 8, there are 5 numbered possibilities for the amount of vowel answers in the quiz; 4, 5, 6, 7, 8. Since we know there are 20 questions. We can say that the amount of consonant answers can either be 16, 15, 14, 13 or 12.
We can compare these 5 numbers to the statements in question 12. 16 is only an even number, 15 is an odd number but also divisible by 5, 14 is also only an even number, 13 is an odd number but also a prime number, and finally, 12 is only an even number.
The only option that has been present alone, is A, and since questions can't have multiple answers, it must therefore be A.
and then i got one point
for questions 6 and 17.
how can the answer to 6 be B since it means the answer to 17 is D= the answer to 6 is none of the above
isn’t B one of the above????
or does that not mean what i think it does ?
Here's the Logic I have:
First, Try: Q6 = C → "Q17 is E"
Then Q17 = E → "Q6 is all of the above"
That implies Q6 is A, B, C, D, and E → Not possible (can't be multiple in multiple-choice logic)
Second, Try: Q6 = D → "Q17 is none of the above"
Then Q17 = D → "Q6 is none of the above" → So Q6 ≠ A, B, C, or D
(That implies Q6 = E (all of the above))
(But we assumed Q6 = D → Contradiction) So there is a contradiction again.
Third, Try: Q6 = E → "Q17 is all of the above"
Then Q17 = E → "Q6 is A, B, C, D" → Again, multiple values can't all be true (as that leads back to the contradictions we previously tested in Q6 for A, B, C, and D)
If Q:17 is answer B --> Then Q6 is answer D (according to Q17)
Q6, answer D says "non of the above", where the above are C, D, and E. (B is neither C, nor D, nor E)
So everything works. Q6 answer D tells you the answer to Q17 is not C, D, or E; which is correct if the answer to Q17 is D.
I normally don't post my time (this might be the first time, though maybe it did it once or twice on a quiz that was relevant) but wanted to show that the time set for this quiz was well done, also that it I really needed it all, it got tense near the end. (Did not read the comments, did rewrite the questions on a notepad on the computer, might have spend a lot of time typing and removing brackets and spaces... If I knew an answer was wrong I put it in brackets, but also then wanted to remove the spaces. Like B A(C)(E)D and I was fumbling a lot there. Wanted it to not look messy... rows needed to be aligned etc haha recapitalizing, yup was wasting time :D, but it helped visually, a bit..) I rewrote it btw so there was less scrolling and the questions were a bit more comprehensive and concise.
That's crazy
As an example I only definitely answered n°5 as my 16th question overall (I kept track of the order in which I answered in case I needed to backtrack). I was down to 2 possible answers early on but I don't see how you could answer it without knowing more about the first 4 questions.
If you're not cautious and check the "obvious" answer for 5 imediately you could argue you can do the same with 9 which would lead you in the wrong direction.
In conclusion awesome quizz but I'm glad I didn't look at the hints
When we start, due to question 1 we can tell that the answer to 1 cannot be A or B, and the answer to 2 cannot be B.
There are then 3 options for question 5. If the answer to 3 is C, then the answer to 5 can be C. If the answer to 4 is D, then the answer to 5 can be D. And of course the answer to 5 can be E.
How can we conclude that the answer to 5 must be E without first eliminating Q3 C and Q4 D as possibilities?
hold on im buffering