http://www.itute.com/wp-content/uploads/2012-nsw-bos-mathematics-extension-2-solutions.pdf
They will put them up soon for 2u / 3u / general too at http://www.itute.com/download-free-vce-maths-resources/free-maths-exams/
They will put them up soon for 2u / 3u / general too at http://www.itute.com/download-free-vce-maths-resources/free-maths-exams/