Search found 173 matches

by Abdul Muntakim Rafi
Tue Dec 27, 2011 2:12 pm
Forum: Number Theory
Topic: Preparation Marathon
Replies: 112
Views: 13045

Re: Preparation Marathon

১।মানি না। আমি আগের টার ৩ টা সল্ভ করছি। আজকে আরও কয়েকটা করব মনে করছিলাম। কিন্তু আগেরটার উত্তর দিয়ে দেওয়া হইছে। :( ২।আর আমার মনে হয় এক দিনের পরিবর্তে দুই দিন সময় দেওয়া উচিত। ৩।আর প্রশ্ন সহজ থেকে কঠিন এভাবে সাজানো উচিত। National এর মত। :idea: PS: Don't mind about all these advices... Just giving...
by Abdul Muntakim Rafi
Mon Dec 26, 2011 3:04 pm
Forum: Number Theory
Topic: Preparation Marathon
Replies: 112
Views: 13045

Re: Preparation Marathon

1. Find the greatest positive integer n such that n consecutive integers are pair-
wisely co-prime.
কেউ আমারে প্রশ্নটা বাংলায় বুঝায়া বলেন। :(
by Abdul Muntakim Rafi
Mon Dec 26, 2011 2:53 pm
Forum: Higher Secondary Level
Topic: Prove me wrong
Replies: 95
Views: 15163

Re: Prove me wrong

Tanvir bhai, how can you say $1/0$ can not be defined? The process I gave shows that $1/0$ can't be defined... But how will you prove that $1/0$ is undefined? You can't just say its undefined cause I can't define it... And I understand what you are saying... u are saying that first we need to define...
by Abdul Muntakim Rafi
Mon Dec 26, 2011 2:31 pm
Forum: Higher Secondary Level
Topic: Prove me wrong
Replies: 95
Views: 15163

Re: Prove me wrong

I am asking how can u say $1/0$ is undefined?
$1/0$ has no meaning, we all know that...
But how can u prove it mathematically?
by Abdul Muntakim Rafi
Mon Dec 26, 2011 12:17 pm
Forum: Higher Secondary Level
Topic: Prove me wrong
Replies: 95
Views: 15163

Re: Prove me wrong

$0$ doesn't have a multiplicative inverse... Why? Because
$0*1/0$ is not equal to 1... Well how can we say that it is not equal to 1?
by Abdul Muntakim Rafi
Mon Dec 26, 2011 12:50 am
Forum: Higher Secondary Level
Topic: Polynomial
Replies: 4
Views: 793

Re: Polynomial

হুম। Thank you Labib... :D
Standard form এ নিলে ঋণাত্মক ঘাত অঋণাত্মক হিসেবে এ নেওয়া যায়।
আর ঘাত ভগ্নাংশ হইলে?
by Abdul Muntakim Rafi
Mon Dec 26, 2011 12:44 am
Forum: Higher Secondary Level
Topic: ধারা এবং কায়কোবাদ স্যার
Replies: 12
Views: 2353

Re: ধারা এবং কায়কোবাদ স্যার

ও হ্যাঁ। ০ আগে থাকা না থাকা একই।
by Abdul Muntakim Rafi
Sun Dec 25, 2011 10:45 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO National Higher Secondary 2009/6
Replies: 6
Views: 1657

Re: BdMO National Higher Secondary 2009/6

My answer is $1520$ ... I am a novice in combi... Maybe I got this wrong... :?:
And Labib I didn't understand this...
The next pair will have 37 choices and it will stay like this until the last pair steps in having 36 ways to choose the 3rd MOVer.
Thus total way,
38+38*37+36=382+36=1480:
by Abdul Muntakim Rafi
Sun Dec 25, 2011 10:33 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO National Junior 2011/5
Replies: 7
Views: 1565

Re: BdMO National Junior 2011/5

Labib edit the typing mistake... should be $106^2-105^2<106^2$