Ashley, Britney, Charles, David, Erika, Frank, and Gusti are having an argument about which day of the week it is. They speak as follows:
Ashley: The day after tomorrow is Wednesday.Britney: No, it is Wednesday today.
Charles: You are both wrong; it is Wednesday tomorrow.
David: Nonsense. Today is neither Monday, Tuesday, nor Wednesday.
Ericka: I'm quite sure yesterday was Thursday.
Frank: No, tomorrow is Thursday.
Gusti: All I know is that yesterday was not Saturday.
If only one of the remarks is true, what day of the week is it?
Solution to the Problem:
Today is Sunday.We rewrite the statements in the following form:
Today is Monday.
Today is Wednesday.
Today is Tuesday.
Today is either Thursday, Friday, Saturday or Sunday.
Today is Friday.
Today is Wednesday.
Today is either Saturday, Monday, Tuesday, Wednesday, Thursday or Friday.
The only day that is not mentioned twice is Sunday, so today is Sunday!
Correctly solved by:
| 1. Jim Arrsion | Norristown, Pennsylvania |
| 2. Sagar Patel | Columbus, Georgia |
| 3. Walt Arrison | Philadelphia, Pennsylvania |
| 4. Misty Carlisle | Cornell University Ithaca, New York |
| 5. Mike Singer | Winchester, Virginia |
| 6. David & Judy Dixon | Bennettsville, South Carolina |
| 7. Erin Fennacy | Fresno, California |
| 8. Jeffrey Gaither | University of Virginia Charlottesville, Virginia |
| 9. Mary Bailey Wickham | Columbus, Georgia |
| 10. Charles Washington | Winchester, Virginia |
| 11. Zaza Carlzon | Tullangsskolan, Örebro, Sweden |
| 12. Malin Fredriksson | Tullängsskolan, Örebro, Sweden |
| 13. Patrick McDuffee | Harrisonburg, Virginia |
| 14. Danny Gordon | Columbus, Georgia |
| 15. Anil Nataraj | Columbus, Georgia |
| 16. Rachel Pridgen | Columbus, Georgia |
| 17. Jerome Pierce | Columbus, Georgia |
| 18. Patrick Chu | Harrisonburg, Virginia |
| 19. Nicole Wells | ---------- |
| 20. Julianne Harris | Winchester, Virginia |
| 21. Evelyne Stalzer | Montville, New Jersey |
| 22. Adam Haglund | Tullängsskolan, Örebro, Sweden |
| 23. Bobby Arthur | Winchester, Virginia |
| 24. Carleton 'Buck' Jones | Midwestern University - Glendale Glendale, Arizona |
| 25. Nicholas Caligaris | Columbus, Georgia |
| 26. Andrew Montoya | Winchester, Virginia |
| 27. Krystle | Harrisonburg, Virginia |
| 28. Mattias Tyresgård | Tullängsskolan, Örebro, Sweden |
| 29. Rickard Jansson | Tullängsskolan, Örebro, Sweden |
| 30. Chelsea Cockburn | Harrisonburg, Virginia |
| 31. Olivia Quach | Harrisonburg, Virginia |
| 32. Joakim Olsson | Tullängsskolan, Örebro, Sweden |
| 33. Richard Johnson | La Jolla, California |
| 34. Ashley Hudson | Harrisonburg, Virginia |
| 35. Magdalena Axelsson | Tullängsskolan, Örebro, Sweden |
| 36. Annie Craig | Harrisonburg, Virginia |
| 37. Tim Beierle | Harrisonburg, Virginia |
| 38. Kelsey Wong | Harrisonburg, Virginia |
| 39. Heather Carroll | Winchester, Virginia |
| 40. Kelley Kolar | Winchester, Virginia |
| 41. Elizabeth Carlson | Winchester, Virginia |