Search found 829 matches
- Fri Jan 18, 2013 5:13 pm
- Forum: News / Announcements
- Topic: Something about 'brilliant.org'
- Replies: 1
- Views: 3302
Re: Something about 'brilliant.org'
I really appreciate the decision. But, again the question is not about just rules or copyright. It is also about self respect. What is the site doing ? It is helping people to know about their capability. So, when one does his jobs in his brilliant account, he is testing himself. Is it just for gett...
- Thu Jan 17, 2013 10:48 pm
- Forum: Number Theory
- Topic: minimum please!
- Replies: 8
- Views: 5753
Re: minimum please!
How can a natural number have a limited number of products ?Rafe wrote:$a,b,c,d,.....$ is a sequence.the number of products of $a,b,c,d,....$ is $2,3,4,5,....$ find the minimum value of a in natural number
Are you talking about factors ?
- Thu Jan 17, 2013 10:44 pm
- Forum: Combinatorics
- Topic: from 1 to 100
- Replies: 8
- Views: 6787
Re: from 1 to 100
Share it, kindly, then.
- Thu Jan 17, 2013 8:54 pm
- Forum: Combinatorics
- Topic: from 1 to 100
- Replies: 8
- Views: 6787
Re: from 1 to 100
i want the answer that how many answers will be same.for example $100$ can be got in $49$ ways, $99$ can be $50$ ways....i want the total sum. Let us see how much far I can go :? we can get, $5,6...197$ as same sums. $5,6;7,8;9,10;11,12;.........;99,100$ can be got in $2;3;4;5.......;49$ ways. now,...
- Thu Jan 17, 2013 11:23 am
- Forum: Primary Level
- Topic: গনিত নয় ধাঁধাঁ
- Replies: 5
- Views: 11340
Re: গনিত নয় ধাঁধাঁ
কিন্তু, এখানে ঠিক কোনগুলোকে যোগ করলে $0$ হয় ?saminreja wrote:সংখ্যাগুলো হল : -2, -3, 4, 7, 8
Barisal Zilla School
- Thu Jan 17, 2013 11:18 am
- Forum: Divisional Math Olympiad
- Topic: Some problems of last year divisionals, I need help for
- Replies: 36
- Views: 20504
Re: Some problems of last year divisionals, I need hel for
More problems have arrived............ Dhaka Secondary 2012 $10.$ In the given diagram, both $ABC$ and $DBE$ are right triangles, $B$ being the right angle for both. They have hypotenuses of same length. $DE$ is perpendicular on $BC$. Area of $ABC$ is $\sqrt 3$ times of $DEF$. Find $\angle BDE$. Is...
- Thu Jan 17, 2013 9:51 am
- Forum: Divisional Math Olympiad
- Topic: Some problems of last year divisionals, I need help for
- Replies: 36
- Views: 20504
Re: Some problems of last year divisionals, I need hel for
More problems have arrived............ Dhaka Secondary 2012 $5.$There are some small stones in a box. Weight of each of the stones is an integer (in units of gram), weight of two different stones cannot be same. If you use them on one side of a scale, you can weigh any integer numbered weight upto $...
- Thu Jan 17, 2013 12:11 am
- Forum: Divisional Math Olympiad
- Topic: Some problems of last year divisionals, I need help for
- Replies: 36
- Views: 20504
Re: Some problems of last year divisionals, I need hel for
@Tiham vaia,the larger triangle $ABC$ is obtuse, and that means its circumcenter is outside. But we are not working on the circumcenter of $ABC$,rather on the circumcenter of $\triangle DEF$. oops... you are right and in the ababab problem, I have just copied from english. The bengali version says ...
- Wed Jan 16, 2013 10:28 pm
- Forum: Social Lounge
- Topic: Any Way
- Replies: 11
- Views: 9775
Re: Any Way
As far as I know, there is a less possibilty of holding an SSC camp. But, still don't lose hope and don't lose your eye on গনিত ইশকুলFahim Shahriar wrote:After $S.S.C.$ we will have enough time. I hope it will be... But how can I know whether it will be held or not?
- Wed Jan 16, 2013 10:24 pm
- Forum: Higher Secondary Level
- Topic: factorial
- Replies: 3
- Views: 4003
Re: factorial
The prime factorization of $40320$ is : \[\displaystyle40320=2^7\times3^2\times5\times7\] Here, you can see that $7$ and $5$ occur only once in the factorization. So, $40320$ can be at least $7!$ and at most $9!$. But, in $9!$, $3$ occurs $3$ times. So, $n\neq9$. Now, if you check, $\displaystyle7!...