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Posted by Kia_Breizzze on Jul-23-2005 20:15:

A Logic Puzzle

This was circulating about a math department last semester and I thought some of you might enjoy it. Good luck.

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. The answer to question 20 is
(A) E
(B) E
(C) E
(D) E
(E) E

I'll post the answers later

Posted by Driguez on Jul-23-2005 20:32:

damn i got a headache

Posted by kanadianiceman on Jul-23-2005 22:17:

1. The first question whose answer is B is question

*shoots self*

Posted by xtractorfan on Jul-24-2005 03:42:

i dont get it

Posted by Kia_Breizzze on Jul-24-2005 22:17:

D,A,D,B,E,D,D,E,D,A,B,A,D,B,A,D,B,A,B,E.

Posted by Nsonic on Jul-25-2005 06:48:

thats pretty clever

Posted by ba55driver on Jul-25-2005 19:22:

very interesting. is there a way to solve this puzzle?

i'd really like to know if there's a certain solution to this.

Posted by Kia_Breizzze on Jul-25-2005 20:46:

quote:
Originally posted by Nsonic
thats pretty clever

the answer is posted above, I got a lot of them by trial and error but had 6 and 17 the wrong way round, and it took me a hella long time

Posted by Dervish on Jul-26-2005 18:17:

quote:
Originally posted by Kia_Breizzze
D,A,D,B,E,D,D,E,D,A,B,A,D,B,A,D,B,A,B,E.

DAD
BEDDED
A
BAD
BAD
BABE?

Hmmmm ok.....

Posted by Kia_Breizzze on Jul-26-2005 19:58:

quote:
Originally posted by Dervish
DAD
BEDDED
A
BAD
BAD
BABE?

Hmmmm ok.....

Posted by Basstard on Jul-27-2005 01:44:

see kids - maths can be fun!