November 15, 2019, 04:48:06 PM
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Chemistry

Started by Richardjohn | Last post by Borek October 12, 2019, 04:03:28 AM

1 Replies
371 Views
Last post October 12, 2019, 04:03:28 AM
by Borek
Not a problem of the week, but similar level of difficulty

Started by Borek « 1 2 » | Last post by Borek November 19, 2017, 06:34:32 AM

18 Replies
21340 Views
Last post November 19, 2017, 06:34:32 AM
by Borek
Problem of the week - 03/06/2013

Started by Borek | Last post by Big-Daddy September 23, 2013, 01:11:11 PM

13 Replies
25547 Views
Last post September 23, 2013, 01:11:11 PM
by Big-Daddy
Problem of the week - 27/05/2013

Started by Borek | Last post by Big-Daddy May 30, 2013, 05:22:17 PM

12 Replies
21747 Views
Last post May 30, 2013, 05:22:17 PM
by Big-Daddy
Problem of the week - 20/05/2013

Started by Borek | Last post by DrCMS May 27, 2013, 03:05:59 AM

6 Replies
16197 Views
Last post May 27, 2013, 03:05:59 AM
by DrCMS
Problem of the week - 13/05/2013

Started by Borek | Last post by kriggy May 20, 2013, 06:05:04 PM

11 Replies
19125 Views
Last post May 20, 2013, 06:05:04 PM
by kriggy
Problem of the week - 06/05/2013

Started by Borek | Last post by delta609 May 11, 2013, 02:48:45 PM

10 Replies
18535 Views
Last post May 11, 2013, 02:48:45 PM
by delta609
Problem of the week - 24/09/2012

Started by Borek | Last post by maugeredson May 06, 2013, 02:52:23 PM

11 Replies
19221 Views
Last post May 06, 2013, 02:52:23 PM
by maugeredson
Problem of the week - 29/04/2013

Started by Borek « 1 2 » | Last post by Rutherford May 03, 2013, 09:35:06 AM

15 Replies
29080 Views
Last post May 03, 2013, 09:35:06 AM
by Rutherford
Problem of the week - 22/04/2013

Started by Borek | Last post by Borek April 29, 2013, 04:42:58 PM

2 Replies
9017 Views
Last post April 29, 2013, 04:42:58 PM
by Borek
Problem of the week - 15/04/2013

Started by Borek | Last post by Big-Daddy April 24, 2013, 02:05:03 PM

6 Replies
10535 Views
Last post April 24, 2013, 02:05:03 PM
by Big-Daddy
Problem of the week - 08/04/2013

Started by Borek | Last post by Borek April 12, 2013, 05:38:10 PM

9 Replies
12212 Views
Last post April 12, 2013, 05:38:10 PM
by Borek
Problem of the week - 25/03/2013

Started by Borek | Last post by AWK April 09, 2013, 03:00:07 AM

10 Replies
18056 Views
Last post April 09, 2013, 03:00:07 AM
by AWK
Problem of the week - 11/03/2013

Started by Borek « 1 2 » | Last post by Borek March 18, 2013, 04:24:00 PM

15 Replies
23575 Views
Last post March 18, 2013, 04:24:00 PM
by Borek
Problem of the week - 04/03/2013

Started by Borek | Last post by Big-Daddy March 08, 2013, 02:37:19 PM

9 Replies
12062 Views
Last post March 08, 2013, 02:37:19 PM
by Big-Daddy
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