Search found 183 matches

Mon Feb 15, 2016 8:48 am
Topic: BDMO national higher secondery -prb 07
Replies: 2
Views: 2071

Re: BDMO national higher secondery -prb 07

Assume triangles $COB,COA,AOB$ have area $p,q,r$ respectively. Then express every ratio in terms of $p,q,r$.
Fri Feb 05, 2016 11:29 pm
Forum: Primary Level
Topic: Divisional Math Olympiad, Dhaka-2016,primary, ques. 7
Replies: 10
Views: 6330

Re: Divisional Math Olympiad, Dhaka-2016,primary, ques. 7

ahsaf wrote:I didn't understand why are we taking $99$ to prove the problem
Because $x$ has the only value $99$.
Wed Feb 03, 2016 12:36 pm
Forum: Junior Level
Topic: Easy Chess Tournament Problem
Replies: 1
Views: 1221

Let $A,B,C$ be the set of first $3$,middle $4$ and last $5$ players respectively according to their rank and $U$ is the union set.Let $f(X,Y)$ denote the total score gained by the players of set $X$ against players of set $Y$.Easy to see that every match has total outcome of point $1$. now $f(A,U)=f... Sun Jan 31, 2016 4:03 pm Forum: Primary Level Topic: Divisional Math Olympiad, Dhaka-2016,primary, ques. 7 Replies: 10 Views: 6330 Re: Divisional Math Olympiad, Dhaka-2016,primary, ques. 7 Mon Jan 25, 2016 10:46 pm Forum: Secondary Level Topic: 2014-national Replies: 15 Views: 5150 Re: 2014-national seemanta001 wrote:The solution is: For an$m \times n$chessboard, the number of the knights is$n \times \lceil\dfrac{m}{3}\rceil$. Can you please explain your solution?? Mon Jan 25, 2016 10:32 pm Forum: Geometry Topic: A BEAUTIFUL GEO Replies: 1 Views: 1173 Re: A BEAUTIFUL GEO Mon Jan 25, 2016 9:33 pm Forum: Divisional Math Olympiad Topic: Dhaka regional higher secondary/8 Replies: 3 Views: 1984 Re: Dhaka regional higher secondary/8 Prove that if$5 \nmid x$, then$f(x)=0\$ using the first 2 conditions.
Mon Jan 25, 2016 9:04 pm
Topic: Dhaka regional 2015 secondary/4
Replies: 2
Views: 1496

Re: Dhaka regional 2015 secondary/4

Mon Jan 25, 2016 8:54 pm
Forum: Social Lounge
Topic: A frequently asked question (FAQ)
Replies: 3
Views: 1899

Re: A frequently asked question (FAQ)

Of course. But set square is not allowed in IMO.
Sun Jan 10, 2016 10:40 pm
Forum: Geometry
Topic: Chinese Girls' Mathematical Olympiad 2015,P1
Replies: 4
Views: 1902