Search found 829 matches

by nafistiham
Mon Jan 28, 2013 9:55 am
Forum: Physics
Topic: TARZAN
Replies: 7
Views: 3646

Re: TARZAN

Well, I think more than everything of the problem has been discussed here. But, still, I wish to add a little more. When we say 'tarzan is hit', tarzan must be hit no matter what. Just, if i can arrange an environment that has a safe tarzan, then, we can't say that. Now, the bullet definitely has a ...
by nafistiham
Mon Jan 28, 2013 9:41 am
Forum: Combinatorics
Topic: Rubik's Cube Comb
Replies: 4
Views: 2813

Re: Rubik's Cube Comb

see the permutations part.
by nafistiham
Sun Jan 27, 2013 4:30 pm
Forum: Social Lounge
Topic: Negative Marking
Replies: 7
Views: 3364

Re: Negative Marking

I have not seen that, so far (9 times).
As, I have answered wrong so many times.
;) :lol:
by nafistiham
Sun Jan 27, 2013 4:28 pm
Forum: Social Lounge
Topic: Help...!!!...
Replies: 2
Views: 1804

Re: Help...!!!...

I don't know whether I am older than you, or not. But, still, I'll say something which will be helpful for you, I hope. Firstly, please try to use either Bangla or English. For, math club around you, I'm sorry that I know no such clubs. And, olympiad problems are not that much special from our text ...
by nafistiham
Sun Jan 27, 2013 1:55 pm
Forum: Secondary Level
Topic: Congruence
Replies: 10
Views: 5378

Re: Congruence

*Mahi* wrote:
nafistiham wrote: কিন্তু, আমার যেটা জিজ্ঞাসা, এটা কি miktex ধরণের কিছু ব্যবহার করে লিখেছ, নাকি microsoft word দিয়েই ?
Microsoft Word, আমি যতদূর জানি।
সেটাই । লেখাগুলো latex মনে হচ্ছে না । কিন্তু, microsft word এও যে এত সুন্দর লেখা যায়, জানতাম না । এজন্যে দ্বিধান্বিত ছিলাম ।
by nafistiham
Sun Jan 27, 2013 1:53 pm
Forum: Number Theory
Topic: minimum please!
Replies: 8
Views: 3415

Re: minimum please!

Prosenjit Basak wrote:I don't think so.You said $a=4$.But $4$ has $3$ factors. But in the question Rafe said $a$ has $2$ factors. So $a$ can't be $4$. I think Fahim Bhai may be correct.
:oops: :oops: ...... that really was a lousy mistake. :oops:
by nafistiham
Sun Jan 27, 2013 1:51 pm
Forum: Physics
Topic: will it come back
Replies: 9
Views: 4087

Re: will it come back

আসলে ব্যাপারটা অন্যরকম। পৃথিবী থেকে ছোড়া কোনো বস্তু পৃথিবীতে ফিরে আসবে কিনা তা বস্তুটির ভরের ওপর নির্ভর করে না তা ভর পৃথিবীর সমানই হোক বা তার থেকে বেশি। কত জোরে বস্তুটিকে ছোড়া হচ্ছে তার ওপর নির্ভর করে । যদি ছোড়ার গতি মুক্তিবেগের বেশি হয় তবে তা আর ফিরে আসবে না। আর মুক্তিবেগের কম হলে তা আবার পৃথি...
by nafistiham
Sun Jan 27, 2013 1:36 pm
Forum: Secondary Level
Topic: Congruence
Replies: 10
Views: 5378

Re: Congruence

প্রথমেই বাংলায় এমন একটা লেখার জন্যে অনেক ধন্যবাদ ।
আশা করি ভবিষ্যতে এমন আরও লেখা পাব, আর এ লেখাটিও সমৃদ্ধ হবে ।

কিন্তু, আমার যেটা জিজ্ঞাসা, এটা কি miktex ধরণের কিছু ব্যবহার করে লিখেছ, নাকি microsoft word দিয়েই ?
by nafistiham
Sun Jan 27, 2013 1:32 pm
Forum: Divisional Math Olympiad
Topic: Some problems of last year divisionals, I need help for
Replies: 36
Views: 12081

Re: Some problems of last year divisionals, I need help for

Or you can do it by simple observation. There are $9000$ 4 digit numbers. $4500$ numbers are even. Half of them has sum of digits even and half odd. : I liked the solution :) :) here is another similar. As the $4^{th}$ digit is even. The summation of previous digit must be odd. There are such $\fra...
by nafistiham
Sun Jan 27, 2013 1:24 pm
Forum: Secondary Level
Topic: a problem from the textbook
Replies: 3
Views: 2089

Re: a problem from the textbook

In Bangladesh, most times, you can believe yourself, than the text books' answer. Because, here, doing everything correctly is too hard for so many people, where, one student can have more confidence on himself, if he practices enough. Still, thanks for sharing. Now, anyone who'll see the post will ...