Search found 11 matches

by Golam Musabbir Joy
Wed May 23, 2018 10:07 pm
Forum: Social Lounge
Topic: Chat thread
Replies: 53
Views: 6434

Re: Chat thread

M. M. Fahad Joy wrote:
Tue May 22, 2018 1:51 pm
Hello, Golam Bhai. My name is same as you.
Everybody call me Gomuj. You can call me that. ^_^
by Golam Musabbir Joy
Mon May 21, 2018 9:30 pm
Forum: National Math Camp
Topic: The Gonit IshChool Project - Beta
Replies: 28
Views: 3318

Re: The Gonit IshChool Project - Beta

Name you'd like to be called: Gomuj
Course you want to learn:Functional Equation
Preferred methods of communication (Forum, Messenger, Telegram, etc.): Telegram, Forum
Do you want to take lessons through PMs or Public?: public
by Golam Musabbir Joy
Sun May 20, 2018 9:13 am
Forum: Social Lounge
Topic: Chat thread
Replies: 53
Views: 6434

Re: Chat thread

Hi everyone. I am MD Golam Musabbir Joy, from Barisal.
by Golam Musabbir Joy
Sat May 19, 2018 8:33 pm
Forum: Combinatorics
Topic: Football and Combi
Replies: 3
Views: 557

Re: Football and Combi

Let the weights of the peoples are $a_1,a_2, \dots a_{23} $ and $\sum a_i = S$. It is clear that $S - a_i$ is always even. So that $S $ and all $a_i $ nust have the same parity. It is also clear that if $a_i $ is a solution then $a_i + 1$ is also a solution. Let $b_1, b_2, \dots , b_{23} $ be one of...
by Golam Musabbir Joy
Sat May 19, 2018 8:04 pm
Forum: Combinatorics
Topic: need the solution
Replies: 5
Views: 1053

Re: need the solution

We can solve this problem in this way too. We will count in how many ways x can miss $100$ marks out of $300$. let $p$ be the missed marks in physics, $c$ be the missed marks in chemistry and $m$ be the missed marks in mathematics. so we have to find in how many ways $p+c+m=100$ can be possible wher...
by Golam Musabbir Joy
Mon Aug 08, 2016 2:29 am
Forum: Geometry
Topic: Clash of orthogonal circle
Replies: 1
Views: 448

Clash of orthogonal circle

$ABC$ triangle, $W_a$ is a circle with center on $BC$ passing through $A$ and orthogonal to circumcircle of $ABC$ . $W_b$ , $W_c$ are defined similarly. prove that center of $W_a$ , $W_b$ , $W_c$ are collinear. :mrgreen:
by Golam Musabbir Joy
Mon Aug 08, 2016 12:45 am
Forum: Higher Secondary Level
Topic: A problem of combinatorics
Replies: 9
Views: 2019

Re: A problem of combinatorics

The actual solution to this problem is like this- 1 can shook hands with a max. of 35 people. Then 2 can shook hands with a max. of 34 people (this is the total handshake made including the handshake with the 1st person). Then 3 with max. 33, 4 with 32, 5 with 31, 6 with 30, 7 with 29 and 8 with 30...
by Golam Musabbir Joy
Mon Aug 08, 2016 12:19 am
Forum: Combinatorics
Topic: even odd even odd
Replies: 7
Views: 1279

Re: even odd even odd

Can any row or column be empty?
by Golam Musabbir Joy
Tue May 24, 2016 7:05 am
Forum: International Mathematical Olympiad (IMO)
Topic: IMO 1970
Replies: 2
Views: 906

Re: IMO 1970

By contradiction we assume that there exist a n such that that satisfy this proposition. there is a number in those there must be a number which is divisible by 5. so that , we have another number which is divisible by 5. suppose those number are n , n+5 . now n+1, n+2, n+3, n+4 none of them will no...
by Golam Musabbir Joy
Wed Sep 23, 2015 7:27 pm
Forum: Combinatorics
Topic: Two problems of circular permutations
Replies: 2
Views: 752

Re: Two problems of circular permutations

not sure the ans is 9!