推 lollygagger:哈你也po了 我玩puzzleup最常用到兩個表 10/06 00:16
→ lollygagger:質數跟完全平方數 10/06 00:16
推 grooving:這題應該不用查表 27以下的質數蠻少的XD 10/07 14:31
→ lollygagger:有9個，解該是99開頭的11位數吧 還滿好湊的 10/07 16:26
題目網址: www.puzzleup.com/2011/puzzle/?229
加分時限: 10/6 7PM - 10/11 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）
◆Prime Sums
A number has the following properties:
The sum of every neighboring three numerals in this number is a prime number.
All of these sums are different than each other.
What is the largest possible value of this number?
一個數有如下的性質：
每個連續三位數字的和都是質數，且這些和也都彼此不相等。
這個數最大是多少？
--
最近都在玩質數...XD
還沒仔細做 不過應該和上一題的感覺差不多
--
'You've sort of made up for it tonight,' said Harry. 'Getting the
sword. Finishing the Horcrux. Saving my life.'
'That makes me sound a lot cooler then I was,' Ron mumbled.
'Stuff like that always sounds cooler then it really was,' said
Harry. 'I've been trying to tell you that for years.'
-- Harry Potter and the Deathly Hollows, P.308
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.230.62
※ 編輯: LPH66 來自: 140.112.230.62 (10/06 00:14)