Core 4 worked solutions

Jan 2011

https://docs.google.com/file/d/0B2J1T-insOmpMDYyOWIzOTAtMGY5Ni00NDBkLWExZWItMTc2OTBlNzZlOTFm/edit

June 2010

https://docs.google.com/file/d/0B2J1T-insOmpNDFiOWJiZjUtNzAzMy00NmUzLWJlYzctNjUxYmU3YzJlMGQy/edit

Jan 2010

https://docs.google.com/file/d/0B2J1T-insOmpOTI3MTE5OTctZDQ3Yi00ODk4LWFkODctNGVjZTA0ODUzMjY3/edit

June 2009

https://docs.google.com/file/d/0B2J1T-insOmpZWJkNTJkMjctNWExNS00NDZhLWFkYzYtMDY0MGM0YTgwMDJj/edit

Jan 2009

https://docs.google.com/file/d/0B2J1T-insOmpZDVhODMwMmYtNjRiMS00YzVhLTgxN2UtZDEyMjYzOGY2YTA2/edit

June 2008

https://docs.google.com/file/d/0B2J1T-insOmpYmE0ODVkOGEtNzE3YS00MTc1LWIzMDMtNTMxMDIyYzdjYmEw/edit

Jan 2008

https://docs.google.com/file/d/0B2J1T-insOmpYzJhODIzZmYtOGE4MS00YmJlLThjMjQtYjBiMGE2OTBkYzY0/edit

June 2007

https://docs.google.com/file/d/0B2J1T-insOmpZTE3MTY2ZjMtZmRhZi00NjUxLTg4ZjgtMzYxYjBlNDZjZDc2/edit

Jan 2007

https://docs.google.com/file/d/0B2J1T-insOmpOTU3OWRhOWItZTU1Ni00NGRlLTkwMWMtMTE4N2I5NmQzY2Vj/edit

June 2006

https://docs.google.com/file/d/0B2J1T-insOmpZjU4MDllNGUtZjgxMi00ZTUwLWI4NmQtYjQ2M2MwNTEwNWVj/edit

Jan 2006

https://docs.google.com/file/d/0B2J1T-insOmpZjU4MDllNGUtZjgxMi00ZTUwLWI4NmQtYjQ2M2MwNTEwNWVj/edit

June 2005

https://docs.google.com/file/d/0B2J1T-insOmpNjMzZTZhODctYTJlOS00NmExLTk1NDItZmVkNjg2ZDYyZTYw/edit