8775 /www/nrich/html/content/id/8775/ 10 0000-00-00T00:00:00 <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0"><br></br>  Can you answer the challenges in each chapter of the World of Tan story?</mdoxml> 2 0 0 1 0 0 0 Site Structural bbUpperPrimaryStudent