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    #跟帖#  When moon is between sun and earth, it blocks the radiative heat [腦筋急轉] - wxcfan123(0 bytes ) 2011-12-31
    #跟帖#  要使老外看得懂,建議用indirect proof [腦筋急轉] - wxcfan123(0 bytes ) 2011-12-26
    #跟帖#  google "congruence" and it is "Proofs Using Congruence" check t [腦筋急轉] - wxcfan123(63 bytes ) 2011-12-26
    #跟帖#  google "law of identity". There is a link for it. Check if it is [腦筋急轉] - wxcfan123(44 bytes ) 2011-12-25
    #跟帖#  實際上想問的是:因月球的運動,地球晚上溫度會不會有周期性的變化 [腦筋急轉] - wxcfan123(94 bytes ) 2011-12-24
    由貧論員的科學問題引起的一個科學問題。 [腦筋急轉] - wxcfan123(255 bytes ) 2011-12-24
    #跟帖#  人是抽成真空後放進去的?還是放進去後再開始抽,然後計算5分鍾? [腦筋急轉] - wxcfan123(322 bytes ) 2011-12-23
    #跟帖#  人對溫度的感覺應該與空氣無關吧。比如將手放在鐵上,手心和鐵之間沒 [腦筋急轉] - wxcfan123(43 bytes ) 2011-12-19
    #跟帖#  若是線性,則答案是:f(x)=665x - 386. f(3)=1330... [腦筋急轉] - wxcfan123(0 bytes ) 2011-12-09
    #跟帖#  謝謝好題。腦筋急轉+數學。 [腦筋急轉] - wxcfan123(0 bytes ) 2011-12-04
    #跟帖#  來一個標題黨:半路殺出來的概率事件。找到了算法。概率:35/128. [腦筋急轉] - wxcfan123(296 bytes ) 2011-12-04
    #跟帖#  Second question. [腦筋急轉] - wxcfan123(233 bytes ) 2011-12-03
    #跟帖#  Why the fourth student must cut a bow to form a square? [腦筋急轉] - wxcfan123(0 bytes ) 2011-12-03
    #跟帖#  這個概率有點意思了。重算概率如下。請教有不有好一點的算法? [腦筋急轉] - wxcfan123(548 bytes ) 2011-12-03
    #跟帖#  143547? [腦筋急轉] - wxcfan123(0 bytes ) 2011-12-03
    #跟帖#  分法:先切一個內接正方形。再將它沿一邊等分七等分。概率:1/11! ? [腦筋急轉] - wxcfan123(0 bytes ) 2011-12-02
    #跟帖#  回複:圓O半徑為r,弦AB將圓O分為S和s兩弓形,⦟AOB = x。求:麵積比s / S =? [腦筋急轉] - wxcfan123(89 bytes ) 2011-12-01
    #跟帖#  更正:R=sqrt(OP^2 + 1), 作法見內 [腦筋急轉] - wxcfan123(145 bytes ) 2011-11-21
    #跟帖#  不知理解對沒有。 [腦筋急轉] - wxcfan123(110 bytes ) 2011-11-20
    #跟帖#  女婿。 [腦筋急轉] - wxcfan123(0 bytes ) 2011-11-13
    介紹一個很好的(如果不是最好的)數獨軟件-SudoGu [腦筋急轉] - wxcfan123(829 bytes ) 2011-11-11
    百度文庫中有不少哥德巴赫猜想的初等證明 [腦筋急轉] - wxcfan123(291 bytes ) 2011-11-06
    #跟帖#  很仔細的觀察。 [腦筋急轉] - wxcfan123(253 bytes ) 2011-11-05
    (ZT)科普一下西塔潘猜想 [腦筋急轉] - wxcfan123(1485 bytes ) 2011-10-29
    #跟帖#  您的軟件放在網上了嗎。用什麽寫的。 [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-29
    #跟帖#  終於明白了,這題中的提示其實是糊弄人的。 [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-28
    #跟帖#  13112221? [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-26
    #跟帖#  這證明簡潔。頂一個。 [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-25
    #跟帖#  當然不可能一次到位,反複應用可以解大部分免費報紙上的Sudoku [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-23
    #跟帖#  謝謝!同問PROF MO的中文名? [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-18
    #跟帖#  說真的,這隻能算個說明。等LZ的答案吧。 [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-18
    #跟帖#  回複:理由呢? [腦筋急轉] - wxcfan123(150 bytes ) 2011-10-18
    #跟帖#  從任一方向截這物體,其截麵應該是周長相同的平麵圖形中麵積最大的-園。 [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-18
    #跟帖#  證明時就要用到LZ的旋轉了。(純幾何證明) [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-17
    #跟帖#  估摸著是要將它們搞到一個平麵上去。投影是不行。謝謝! [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-17
    #跟帖#  很好的提示。是不是將Y作伸縮,然後將圓的結果變回來? [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-17
    #跟帖#  試用純幾何方法解一下 [腦筋急轉] - wxcfan123(500 bytes ) 2011-10-16
    #跟帖#  從結果可看出解法。但我的結果有點不一樣。 [腦筋急轉] - wxcfan123(501 bytes ) 2011-10-15
    #跟帖#  狗來一個結果: [腦筋急轉] - wxcfan123(186 bytes ) 2011-10-15
    試解津京擴展的貧論員的問題 [腦筋急轉] - wxcfan123(1088 bytes ) 2011-10-14
    #跟帖#  "當m = 1,根據(1)和(2),D(1) = T(2) - T(1) = 1/2 = (-1)^2 / 2! " [腦筋急轉] - wxcfan123(156 bytes ) 2011-10-13
    #跟帖#  If T(2) - T(1) != 1/2, how to prove Lemma1 of AllBrother? [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-12
    #跟帖#  Roughly, S(n+1) < 2nS(n) < 2(n+1)S(n) ~ 2(n+1)!. Should be conve [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-10
    #跟帖#  Give an example: S(n) = 1/2(S(n-1) + S(n-2)), S(1) = S(2) = 1. [腦筋急轉] - wxcfan123(90 bytes ) 2011-10-10
    #跟帖#  如果沒見過這題,能將S(N)解出來,那水平是相當不錯的了。 [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-10
    #跟帖#  to determine the solution of the system: [腦筋急轉] - wxcfan123(296 bytes ) 2011-10-07
    #跟帖#  It should be the same as calculate the ranks of two matrix to d [腦筋急轉] - wxcfan123(160 bytes ) 2011-10-07
    #跟帖#  回複:A52=4 or 7, how do you know it is 4? Guess and try or some lo [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-04
    #跟帖#  This one is really hard, altough it is only rated to 3 (highest [腦筋急轉] - wxcfan123(249 bytes ) 2011-10-03
    #跟帖#  I know that cell can only be set to 4 or 7, but can not logicall [腦筋急轉] - wxcfan123(0 bytes ) 2011-10-03
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