## Search found 183 matches

- Mon Feb 15, 2016 8:48 am
- Forum: National Math Olympiad (BdMO)
- 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

Because $x$ has the only value $99$.ahsaf wrote:I didn't understand why are we taking $99$ to prove the problem

- Wed Feb 03, 2016 12:36 pm
- Forum: Junior Level
- Topic: Easy Chess Tournament Problem
- Replies:
**1** - Views:
**1221**

### Re: Easy Chess Tournament Problem

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**

- Mon Jan 25, 2016 10:46 pm
- Forum: Secondary Level
- Topic: 2014-national
- Replies:
**15** - Views:
**5150**

### Re: 2014-national

Can you please explain your solution??seemanta001 wrote:The solution is:

For an $m \times n$ chessboard, the number of the knights is $n \times \lceil\dfrac{m}{3}\rceil$.

- Mon Jan 25, 2016 10:32 pm
- Forum: Geometry
- Topic: A BEAUTIFUL GEO
- Replies:
**1** - Views:
**1173**

- 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
- Forum: Divisional Math Olympiad
- Topic: Dhaka regional 2015 secondary/4
- Replies:
**2** - Views:
**1496**

- 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**