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# Self-Referential Aplitude Test ELF-REFERENTIAL APTITUDE TEST, by Jim Propp (propp@math.wisc.edu)

The solution to the following puzzle is unique; in some cases the knowledge that the solution is unique may actually give you a short-cut to finding the answer to a particular question, but it's possible to find the unique solution even without making use of the fact that the solution is unique.

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. Standardized test is to intelligence as barometer is to
[A] temperature (only)
[B] wind-velocity (only)
[C] latitude (only)
[D] longitude (only)
[E] temperature, wind-velocity, latitude, and longitude
First 10 respondants with the correct answer sent to my livejournal email address will get a personalized postcard from yours truely, recognition from readers of the pjammer chronicles as a smart cookie, and other fun prizes.
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