3600 square boxes were aligned as a squre with a length of 60 boxes. Alex put a coin in one of the boxes. Betty wanted to find the coin. Every time she could choose one of the boxes, open it and the eight boxes surrounding it. At least how many boxes must Betty choose to guarantee that she must find the coin?
老師出了ㄧ條數學題,雖我覺得筨案是400,但我總是覺得不是這麼簡單!
老師出了ㄧ條數學題,請幫忙解答!急急急急
2014-09-07 7:55 am
回答 (2)
2014-09-07 9:24 pm
✔ 最佳答案
3600個盒子，其中有一個盒子裝有一個硬幣，每次開9個盒子，最壞的情況當然是全部盒子也打開，即 3600/9，即 400次。
你的答案正確。
你認為太簡單，那是這條題目確實簡單。
計算有懷疑是好的，過分的懷疑只會令人覺得你沒有信心。
給自己多點信心吧！你要承認自己是有能力的。
努力！加油！
2014-09-07 8:47 am
似乎無問題？？？？？
收錄日期: 2021-04-20 15:15:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140906000051KK00119