Answer to April 12, 2004 Problem |
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Not Sold At 7-11 |
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If you bought 3 milks and 2 breads, you'd spend $43,
but there's no way to spend exactly $20. |
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Solution to the Problem:
Solution: There are 30 unattainable numbers.
The list includes 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13,
15, 16, 17, 19, 20, 23, 24, 26, 27, 30, 31, 34, 37, 38, 41, 45,
48, 52, and 59.
Beginning with 60, all numbers can be written as a linear combination of 7 and 11.
James Alarie sent in the following: |
1. Ian Maxfield | Harrisonburg, Virginia |
2. James Alarie | University of Michigan -- Flint Flint, Michigan |
3. Jeffrey Gaither | Winchester, Virginia |
4. Alie Chan | ---------- |
5. Chris Maggiolo | Harrisonburg, Virginia |
6. Walt Arrison | Philadelphia, Pennsylvania |
7. Keith Mealy | Cincinnati, Ohio |
8. Jim Arrison | Norristown, Pennsylvania |
9. Akash Patel | Columbus, Georgia |
10. Richard Johnson | La Jolla, California |
11. Jason Storer | Winchester, Virginia |
12. Dave Smith | Toledo, Ohio |
13. David & Judy Dixon | Bennettsville, South Carolina |
14. Bella Patel | Harrisonburg, Virginia |
15. Helna Patel | Harrisonburg, Virginia |
16. Kathryn Harris | Winchester, Virginia |
17. Cady Ciuba | Columbus, Georgia |
18. Jaime Garcia-Ramirez | Winchester, Virginia |
19. Britney Ford | Winchester, Virginia |
20. Patrick Mize | Columbus, Georgia |
21. Franklin Harcourt | Columbus, Georgia |