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### Combinatorics

Posted: **Thu Mar 15, 2018 10:48 am**

by **Akash7**

How many pairs of natural number can be formed whose LCM will be 7000?This problem has been taken from bdmo regional contest. As I am a new learner,please help me solving the problem in detail.

### Re: Combinatorics

Posted: **Sun Mar 25, 2018 7:04 pm**

by **samiul_samin**

I think this problem should be posted @ divisional math olympiad forum.

You can get in depth solution of this problem at the book "A path to combinatorics for undergraduates " by Titu andresscu.You can easily get the pdf version of that book.

### Re: Combinatorics

Posted: **Tue Mar 27, 2018 4:11 pm**

by **Akash7**

The problem is solved for ordered pairs in your suggested book.But I want the solution for the unordered pairs.Detailed help will be much appreciated.

### Re: Combinatorics

Posted: **Tue Apr 03, 2018 6:47 pm**

by **M. M. Fahad Joy**

samiul_samin wrote: ↑Sun Mar 25, 2018 7:04 pm

I think this problem should be posted @ divisional math olympiad forum.

You can get in depth solution of this problem at the book "A path to combinatorics for undergraduates " by Titu andresscu.You can easily get the pdf version of that book.

Has there any Bangla book?

### Re: Combinatorics

Posted: **Tue Mar 12, 2019 9:04 pm**

by **samiul_samin**

M. M. Fahad Joy wrote: ↑Tue Apr 03, 2018 6:47 pm

samiul_samin wrote: ↑Sun Mar 25, 2018 7:04 pm

I think this problem should be posted @ divisional math olympiad forum.

You can get in depth solution of this problem at the book "A path to combinatorics for undergraduates " by Titu andresscu.You can easily get the pdf version of that book.

Has there any Bangla book?

No,not Bangla version of this book is available.