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Prime numbers

For how many natural numbers $n$, both $n$ and $(n -6)^2 + 1$ are prime?
by Katy729
Thu Dec 14, 2017 8:54 pm
 
Forum: Number Theory
Topic: Prime numbers
Replies: 2
Views: 52

Re: Yet divisibility...

Ok, thanks aritra!! :)
by Katy729
Wed Dec 13, 2017 11:18 pm
 
Forum: Number Theory
Topic: Yet divisibility...
Replies: 6
Views: 409

Re: Yet divisibility...

A solution please..... :(
by Katy729
Wed Dec 13, 2017 8:07 pm
 
Forum: Number Theory
Topic: Yet divisibility...
Replies: 6
Views: 409

Re: Yet divisibility...

Please a solution... :( :( :(
by Katy729
Sat Nov 11, 2017 4:08 pm
 
Forum: Number Theory
Topic: Yet divisibility...
Replies: 6
Views: 409

Re: Yet divisibility...

Someone pleasee. :(
by Katy729
Sat Oct 14, 2017 10:48 pm
 
Forum: Number Theory
Topic: Yet divisibility...
Replies: 6
Views: 409

Re: IMO $2017$ P$1$

Beautifull solution ahmedittihad!! :)
by Katy729
Mon Oct 02, 2017 3:00 pm
 
Forum: International Mathematical Olympiad (IMO)
Topic: IMO $2017$ P$1$
Replies: 4
Views: 586

Re: IMO $2017$ P$1$

Please someone post a solution... :( :(
by Katy729
Fri Sep 15, 2017 3:11 am
 
Forum: International Mathematical Olympiad (IMO)
Topic: IMO $2017$ P$1$
Replies: 4
Views: 586

Re: Yet divisibility...

Please a solution... :(
by Katy729
Wed Sep 06, 2017 6:04 pm
 
Forum: Number Theory
Topic: Yet divisibility...
Replies: 6
Views: 409

Re: a+b+c>=1/a+1/b+1/c

Someone? :(
by Katy729
Wed Sep 06, 2017 6:02 pm
 
Forum: Algebra
Topic: a+b+c>=1/a+1/b+1/c
Replies: 1
Views: 434

Re: Sequence and divisibility

Thanks tanmoy. :)
by Katy729
Wed Sep 06, 2017 5:52 pm
 
Forum: Algebra
Topic: Sequence and divisibility
Replies: 2
Views: 301
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