題目網址: http://www.puzzleup.com/2016/
http://www.puzzleup.com/2016/puzzle/?2
答題時限: ８月４日７ＰＭ－比賽結束（約12月14日）
加分時限: ８月４日７ＰＭ－８月９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）
◆NUMBERED BALLS
There are 100 balls numbered from 1 to 100. You will randomly draw some of
them without replacement. What is the minimum number of balls you need to
draw in order to have probability of drawing at least two consecutive
numbers greater than 50%?
有一百個球，編號 1 至 100。你從中隨機抽取數個球，取出不放回。
試問至少要取出多少球才能使抽出球中有至少兩個連續數的機率大於 50%？