Search found 172 matches

by Zzzz
Sun Dec 12, 2010 6:55 am
Forum: Asian Pacific Math Olympiad (APMO)
Topic: Easiest problem of Apmo
Replies: 18
Views: 7847

Re: Easiest problem of Apmo

Hey, I got the $5^{th}$ solution also. But I couldn't post it as I didn't know that $a,b>0$ :( Here it is: Obviously $(36a+b)=2^m$ and $(36b+a)=2^n$ for some $m,n$. WLOG, let $m\ge n$ \[\therefore 2^n|2^m\] \[\Rightarrow 2^n|36a+b\] \[\Rightarrow 2^n|(36a+b)+2^n\] \[\Rightarrow 2^n|(36a+b)+(36b+a)\]...
by Zzzz
Sun Dec 12, 2010 6:39 am
Forum: Computer Science
Topic: IDE
Replies: 26
Views: 18451

Re: IDE

হুম, চৌধুরী জাফরউল্লাহ শরাফত বর্তমানে dev c++ ব্যবহার করে...
by Zzzz
Sat Dec 11, 2010 9:31 pm
Forum: Site Support
Topic: Some suggestions from me
Replies: 6
Views: 3538

Re: Some suggestions from me

Nice ! I agree.
by Zzzz
Sat Dec 11, 2010 7:27 pm
Forum: Social Lounge
Topic: Mila in BdMO National
Replies: 31
Views: 11694

Re: Mila in BdMO National

শিরোনামহীন শিরোনামহীন শিরোনামহীন শিরোনামহীন শিরোনামহীন :) :) :)
খুব ভাল পাই :D
by Zzzz
Sat Dec 11, 2010 7:22 pm
Forum: Divisional Math Olympiad
Topic: Problems
Replies: 18
Views: 6441

Re: Problems

Probably Rakeen will give solution of problem 1. Here is solution to problem 2: If we choose any two points that are not on same side of the $n\ gon$ then we will find a straight line. Lets number the sides of $n\ gon$ with $1,2,3,...,n$. Start with side $1$. For each of the $m$ points of this side,...
by Zzzz
Sat Dec 11, 2010 1:36 pm
Forum: Geometry
Topic: Geometry Marathon v1.0
Replies: 23
Views: 10904

Re: Geometry Marathon v1.0

TIUrmi wrote:Please please reply the two questions in coloured font. @Admin or anybody who can.
Cabri II says $P,Q$ and $R$ are collinear in problem 1 ! But I couldn't prove it.. :x
by Zzzz
Sat Dec 11, 2010 5:25 am
Forum: Divisional Math Olympiad
Topic: Problems
Replies: 18
Views: 6441

Re: Problems

What means unit digit?
by Zzzz
Sat Dec 11, 2010 5:21 am
Forum: Social Lounge
Topic: Mila in BdMO National
Replies: 31
Views: 11694

Re: Mila in BdMO National

মিলা না আসাই মনে হয় ভাল। একবার সে আসছিল BdMO তে, সেই অভিজ্ঞতা থেকেই বলতেছি। যেমন মনে করেন, গতবার এসে সে গান গাইতে গাইতে একসময় "রূপবানে নাচে" বলে অতি উৎসাহের সাথে উপস্থিত দর্শকদের দিকে মাইক ধরল। সবাই চুপচাপ, অভিভাবকরা বিরক্ত। হাস্যকর পরিস্থিতি :?
by Zzzz
Fri Dec 10, 2010 8:21 pm
Forum: Number Theory
Topic: Find the number of x
Replies: 8
Views: 3650

Re: Find the number of x

O O... Probably I haven't understood the question.. Does $12$ belong to the solution set?
by Zzzz
Fri Dec 10, 2010 7:24 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO 2010 H. Sec. problem 8
Replies: 22
Views: 8905

Re: BdMO 2010 H. Sec. problem 8

GCD means Greatest Common Divisor (গ.সা.গু)

$a\equiv b(mod\ n)$ means if you divide $a$ and $b$ by $n$, you will get same residue. In other words, $a-b$ is divisible by $n$.

You can read more here.