P.16
27) Given a four-digit odd number which is greater than 9000 and is divisible by 13. When rounded off to 3 significant figures, it is divisible by 4. When rounded off to 2 significant figures, it is divisible by 11. Find the number.
P.62 (http://www.hkedcity.net/ihome/cabinet/get_file.phtml?CCI01092007_00001.bmp)
19) b) Write down a triangle similar to △ABC. Hence, find the length of BD, correct to 4 significant figures.
更新1:
55... 好多謝你答左第一題! 至於教育城... 我申請緊一個ac比你睇圖...
更新2:
得既話請幫手答埋以下幾條︰ http://hk.knowledge.yahoo.com/question/?qid=7007090101567 http://hk.knowledge.yahoo.com/question/?qid=7007090103980 http://hk.knowledge.yahoo.com/question/?qid=7007090104280
更新3:
http://hk.knowledge.yahoo.com/question/?qid=7007090104342 http://hk.knowledge.yahoo.com/question/?qid=7007090104351