SELF-REFERENTIAL APTITUDE TEST, by Jim Propp

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