9163 /www/nrich/html/content/id/9163/ 10 2012-09-10T11:33:55 <?xml version="1.0" encoding="UTF-8"?> <mdoxml version="1.0">Have a go at exploring as you look at these challenges, maybe with others. Talk about how it is going and if a slip-up occurs, then find a way out!<br></br> <br></br> <br></br></mdoxml> 2 0 0 0 0 0 0