northwolves 发表于 2011-1-4 14:58:34

The Battle of Brains

印度组织的，GOOGLE赞助的一个竞赛：http://www.athena.kurukshetra.org.in/desktop.php
欢迎大家参与

zgg___ 发表于 2011-1-5 15:29:43

呜呜，为什么连Practice Questions都过不去呢？

Question :
Superstition holds Friday the 13th (a Friday that occurs on the 13th of a month) to be a day of good or bad luck . Find out the months in which Friday the 13th occurs in the year 34567 A.D ?
Answer the month(s) in order without any blankspaces.

我回答2311，为什么返回错误呢？
<< Calendar`;
Table[{i, DayOfWeek[{34567, i, 13}]}, {i, 12}]
{{1, Tuesday}, {2, Friday}, {3, Friday}, {4, Monday}, {5,Wednesday}, {6, Saturday}, {7, Monday}, {8, Thursday}, {9,Sunday}, {10, Tuesday}, {11, Friday}, {12, Sunday}}

northwolves 发表于 2011-1-5 22:05:00

month(s),means: februarymarchnovember

northwolves 发表于 2011-1-6 08:38:55

End Of Practice Contest



Get Ready for the Main Contest on Jan 7,2011 - 9.00 PM IST(GMT+5.30)

northwolves 发表于 2011-1-6 08:40:01

第4题：0.046481,为什么不对？

zgg___ 发表于 2011-1-6 11:20:07

To 5 层：
我今天才上，已经看不到问题了。

northwolves 发表于 2011-1-6 11:33:44

To 5 层：
我今天才上，已经看不到问题了。
zgg___ 发表于 2011-1-6 11:20 http://bbs.emath.ac.cn/images/common/back.gif
那就准备明天参加正式比赛

zgg___ 发表于 2011-1-11 13:28:30

到Q13过不去了，呵呵。

zgg___ 发表于 2011-1-11 17:07:59

设p和q都是质数，且p=2q-1，如果p很大，比方说大约在10^12附近，如何快速的求出Mod(Binomial(p,q),p^2)的值？

northwolves 发表于 2011-1-11 17:36:38

8# zgg___


很强啊。我第8题现在还没看懂
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