Puzzleup 2015 (3) Half of Its Square - 拼圖
By Tom
at 2015-08-13T07:42
at 2015-08-13T07:42
Table of Contents
題目網址: http://www.puzzleup.com/2015/
http://www.puzzleup.com/2015/puzzle/?3
答題時限: 8月13日7PM-比賽結束(約12月16日)
加分時限: 8月13日7PM-8月18日6:59PM
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)
◆HALF OF ITS SQUARE
All digits of a number are different and for each of its digits that has at
least two other digits on its right, the half of the square of that digit is
greater than the multiplication of the two digits immediately following on
its right.
What is the greatest number having this property?
有個數,各位數不同,且對每個右邊有至少兩位數的位數來說,
自己的平方的一半比右邊鄰接的兩個位數的乘積要大。
試問此數最大多少?
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拼圖
All Comments
By Zenobia
at 2015-08-15T21:12
at 2015-08-15T21:12
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