Search found 7 matches
- Wed Jan 31, 2018 10:31 am
- Forum: Junior Level
- Topic: problem 5 (elementary) Iranian geometry Olympiad 2017
- Replies: 4
- Views: 8069
Re: problem 5 (elementary) Iranian geometry Olympiad 2017
Post the problem in some other forum,like AoPS.This forum is dead.
- Mon Oct 30, 2017 2:31 pm
- Forum: Secondary Level
- Topic: AREA
- Replies: 1
- Views: 2587
AREA
What is the area bounded by the region $$|x+y|+|x-y|=4$$.Where $$x,y$$ are real numbers.
- Wed Apr 26, 2017 6:56 pm
- Forum: Physics
- Topic: A problem of BdPhO'17
- Replies: 5
- Views: 5745
Re: A problem of BdPhO'17
which category?
- Wed Apr 26, 2017 6:37 pm
- Forum: Junior Level
- Topic: 14x14 grid
- Replies: 1
- Views: 2700
14x14 grid
Is it possible to completely completely a $$14$$x$$14$$ grid by T shaped blocks from the diagram such that no blocks overlaps any other block?Explain the answer with logic
- Sun Apr 16, 2017 1:06 pm
- Forum: Number Theory
- Topic: Euler's Criterion
- Replies: 3
- Views: 56861
Euler's Criterion
$$A \equiv X^2$$ (mod $$N$$) then find all the integer solutions of $$X$$
- Wed Apr 12, 2017 2:23 pm
- Forum: National Math Olympiad (BdMO)
- Topic: BdMO 2017 junior/4
- Replies: 11
- Views: 7843
Re: BdMO 2017 junior/4
what is crt?ahmedittihad wrote:Apply crt to get $n=585$.
- Tue Feb 14, 2017 12:48 pm
- Forum: Junior Level
- Topic: geomerty
- Replies: 10
- Views: 8262
Re: geomerty
Let's extend AC and define two points $F$ and $E$ such that $CE = BC$ and $CD = CF$. By some angle chasing, $\angle DEF = \angle EDF \Rightarrow DF = EF$ $\angle DFA = \angle FAD \Rightarrow DF = AD$ $\therefore AD = EF$ Now , $AD + CD = EF + CF = CE = BC = 2017$ :D Summation of any two side of a t...