## Search found 829 matches

- Fri Jan 18, 2013 5:13 pm
- Forum: News / Announcements
- Topic: Something about 'brilliant.org'
- Replies:
**1** - Views:
**2060**

### 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:
**3415**

### 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:
**3987**

### 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:
**3987**

### 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:
**6545**

### 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:
**12075**

### 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:
**12075**

### 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:
**12075**

### 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:
**5992**

### 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:
**2438**

### 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!...