Preparation Marathon

For discussing Olympiad Level Number Theory problems
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Masum
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Re: Preparation Marathon

Unread post by Masum » Mon Dec 26, 2011 3:03 pm

Actually he sent a pm but I asked him to do so, so that others can see this as well. :)
And you can send the solutions to Mahi too.
One one thing is neutral in the universe, that is $0$.

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Abdul Muntakim Rafi
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Re: Preparation Marathon

Unread post by Abdul Muntakim Rafi » Mon Dec 26, 2011 3:04 pm

1. Find the greatest positive integer n such that n consecutive integers are pair-
wisely co-prime.
কেউ আমারে প্রশ্নটা বাংলায় বুঝায়া বলেন। :(
Man himself is the master of his fate...

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Masum
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Re: Preparation Marathon

Unread post by Masum » Mon Dec 26, 2011 3:09 pm

এমন সবচেয়ে বড় $n$ বের কর যাতে $n$ টা ক্রমিক সংখ্যা জোড়ায় জোড়ায় সহমৌলিক হয়
One one thing is neutral in the universe, that is $0$.

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Masum
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Re: Preparation Marathon

Unread post by Masum » Mon Dec 26, 2011 3:10 pm

Current Score:
1. Mahi: 80
He had a little mistake in $3$.
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sm.joty
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Re: Preparation Marathon

Unread post by sm.joty » Mon Dec 26, 2011 7:34 pm

এমন সবচেয়ে বড় n বের কর যাতে n টা ক্রমিক সংখ্যা জোড়ায় জোড়ায় সহমৌলিক হয়
Did there asked for all possible pair or consecutive pair ?? :?:
I mean $1,2,3,4,5,6,7,8,9,10$
here we can pair possibly $_{2}^{10}\textrm{C}$
but there all numbers aren't co-prime.
But if we make $(1,2), (3,4), (5,6),..........$
consecutive pairs it always generates co-prime pairs.
হার জিত চিরদিন থাকবেই
তবুও এগিয়ে যেতে হবে.........
বাধা-বিঘ্ন না পেরিয়ে
বড় হয়েছে কে কবে.........

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Masum
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Re: Preparation Marathon

Unread post by Masum » Mon Dec 26, 2011 7:54 pm

sm.joty wrote:
এমন সবচেয়ে বড় n বের কর যাতে n টা ক্রমিক সংখ্যা জোড়ায় জোড়ায় সহমৌলিক হয়
Did there asked for all possible pair or consecutive pair ?? :?:
I mean $1,2,3,4,5,6,7,8,9,10$
here we can pair possibly $_{2}^{10}\textrm{C}$
but there all numbers aren't co-prime.
But if we make $(1,2), (3,4), (5,6),..........$
consecutive pairs it always generates co-prime pairs.
But I meant that all possible pairs have to be co-prime.
One one thing is neutral in the universe, that is $0$.

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Labib
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Re: Preparation Marathon

Unread post by Labib » Mon Dec 26, 2011 8:04 pm

মাসুম ভাই!!
৭ নম্বর তো ছুপা রুস্তম!! :D
ঐটা নিয়ে নতুনভাবে কাজ করতেসি!
তবে প্রবলেমগুলার ডিফিকাল্টি লেভেল উল্লেখ করলে ভাল হইত... :P
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*Mahi*
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Re: Preparation Marathon

Unread post by *Mahi* » Tue Dec 27, 2011 12:06 am

Time's up for season 1 preparation marathon.
Send your answers through PM to me or Masum vai asap.
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Nur Muhammad Shafiullah | Mahi

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Labib
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Re: Preparation Marathon

Unread post by Labib » Tue Dec 27, 2011 12:09 am

Mahi, When do I get the solutions?
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*Mahi*
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Re: Preparation Marathon

Unread post by *Mahi* » Tue Dec 27, 2011 12:14 am

Okay, I think I'll post the complete solution set in about 1:00 . I think Masum Vai will agree.
Be notified, any submission of solution after that time will not be accepted.
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