Maths Q,not difficult!

2007-04-21 10:04 pm
Can somebody help me to translate this maths Q into chinese,

The digits used to number all the pages of a book were counted. If the number of digits used was 216, find the number of pages in the book.

I just want the TRANSLATION, no need to count for me, thx a lot!

回答 (2)

2007-04-21 11:35 pm
✔ 最佳答案
一本書所有頁數的數位數目總和係216
e.g.第59頁的有兩個數位,數位數目係2
第1-9頁的數位數目係1
第10-99頁的數位數目係2
第100-999頁的數位數目係3

設該書有x頁
如果該書有99頁,
數位數目總和=9(1)+(90)(2)=189
所以x>99
189+(x-99)(3)=216
(x-99)*3=27
x=108
所以該書有108頁
2007-04-21 10:14 pm
我唔知譯得好唔好@@
應該係:呢d數字用於計算一本書總共有幾多頁
如果d數字是216,咁本書總共有幾頁?

2007-04-22 19:59:40 補充:
下面果個譯得好好多@@


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