Puzzleup 2011 (09) Digital Watch - 拼圖
By Christine
at 2011-09-22T02:26
at 2011-09-22T02:26
Table of Contents
題目網址: www.puzzleup.com/2011/puzzle/?227
加分時限: 9/22 7PM - 9/27 7PM
答對可得基本分100分。答案可上傳5次,每改1次答案從基本分扣20分。
比賽期間內可隨時上傳答案,加分時限內答對第n天加(6-n)分
另依題目的難易有額外加分(如有80%的人這題答錯,答對者加80分)
◆Digital Watch
You have a digital watch which works on a 24-hour setup and shows hours and
minutes. Looking at the watch at a certain time, you make the following
observations:
‧ If the four figures on the watch are read from left to right, you get a
prime number.
‧ Each figure, is larger than the figure to its left. (ex. 03:56, 13:49)
Both observations were valid eight minutes ago; and they will be valid one
hour later.
What time is it?
你有一個數字鐘,它以 24 小時制顯示小時和分。
你在某個時間看向這個數字鐘,發現了兩件事:
‧將鐘面上的四個數字由左讀到右,會得到一個質數。
‧每個數字都比它左邊的那個數字還大。(如 03:56, 13:49)
這兩件事在八分鐘前也成立;而一小時後這兩件事仍然成立。
請問這時間是什麼時候?
--
微妙 感覺是紙筆繁題....
--
有人喜歡邊玩遊戲邊上逼;
也有人喜歡邊聽歌邊打字。
但是,我有個請求,
選字的時候請專心好嗎?
-- 改編自「古 火田 任三郎」之開場白
--
Tags:
拼圖
All Comments
By Carolina Franco
at 2011-09-26T14:12
at 2011-09-26T14:12
By Hamiltion
at 2011-10-01T02:11
at 2011-10-01T02:11
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