Search found 47 matches
- Thu Dec 14, 2017 8:54 pm
- Forum: Number Theory
- Topic: Prime numbers
- Replies: 4
- Views: 6891
Prime numbers
For how many natural numbers $n$, both $n$ and $(n -6)^2 + 1$ are prime?
- Wed Dec 13, 2017 11:18 pm
- Forum: Number Theory
- Topic: Yet divisibility...
- Replies: 6
- Views: 7936
Re: Yet divisibility...
Ok, thanks aritra!!
- Wed Dec 13, 2017 8:07 pm
- Forum: Number Theory
- Topic: Yet divisibility...
- Replies: 6
- Views: 7936
Re: Yet divisibility...
A solution please.....
- Sat Nov 11, 2017 4:08 pm
- Forum: Number Theory
- Topic: Yet divisibility...
- Replies: 6
- Views: 7936
Re: Yet divisibility...
Please a solution...
- Sat Oct 14, 2017 10:48 pm
- Forum: Number Theory
- Topic: Yet divisibility...
- Replies: 6
- Views: 7936
Re: Yet divisibility...
Someone pleasee.
- Mon Oct 02, 2017 3:00 pm
- Forum: International Mathematical Olympiad (IMO)
- Topic: IMO $2017$ P$1$
- Replies: 4
- Views: 8861
Re: IMO $2017$ P$1$
Beautifull solution ahmedittihad!!
- Fri Sep 15, 2017 3:11 am
- Forum: International Mathematical Olympiad (IMO)
- Topic: IMO $2017$ P$1$
- Replies: 4
- Views: 8861
Re: IMO $2017$ P$1$
Please someone post a solution...
- Wed Sep 06, 2017 6:04 pm
- Forum: Number Theory
- Topic: Yet divisibility...
- Replies: 6
- Views: 7936
Re: Yet divisibility...
Please a solution...
- Wed Sep 06, 2017 6:02 pm
- Forum: Algebra
- Topic: a+b+c>=1/a+1/b+1/c
- Replies: 3
- Views: 9607
Re: a+b+c>=1/a+1/b+1/c
Someone?
- Wed Sep 06, 2017 5:52 pm
- Forum: Algebra
- Topic: Sequence and divisibility
- Replies: 2
- Views: 8314
Re: Sequence and divisibility
Thanks tanmoy.