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Question with 1,000 views. This badge can be awarded multiple times.

earned this badge 98 times.
Professor Halfbrain and the 9x9 chessboard (Part 1)
Awarded Dec 3 '19 at 14:20
Professor Halfbrain and the 9x9 chessboard (Part 2)
Awarded Aug 20 '19 at 0:35
The Erasmus rook tour
Awarded Mar 2 '19 at 14:50
Spider and fly on a cube
Awarded Jan 11 '19 at 22:30
Four-by-four square
Awarded Jan 8 '19 at 10:20
Professor Halfbrain and the odd perfect number
Awarded Jul 27 '18 at 21:40
Inside or outside the square?
Awarded Jul 14 '18 at 0:45
The Great Houdini's awesome card guessing trick (3)
Awarded Jan 23 '18 at 3:32
The grazing cows of Sir Isaac Newton
Awarded Nov 28 '17 at 23:17
Professor Halfbrain and the tilted cube
Awarded Oct 16 '17 at 17:19
The knight's game
Awarded Sep 25 '17 at 17:30
(post deleted or otherwise unavailable)
Awarded Sep 11 '17 at 12:56
Circle of numbers
Awarded Aug 21 '17 at 4:36
The Great Houdini's awesome card guessing trick (2)
Awarded Jul 5 '17 at 1:51
A row of 2015 red and white chips
Awarded Jan 7 '17 at 13:33
Professor Halfbrain and the sum of the digits of all divisors
Awarded May 25 '16 at 22:39
Uphill and downhill [closed]
Awarded May 18 '16 at 17:10
A search game with 2016 numbers
Awarded May 12 '16 at 17:27
(post deleted or otherwise unavailable)
Awarded Apr 21 '16 at 20:34
Red cells in a 4x4 table
Awarded Apr 19 '16 at 17:31
Red cells in a 2016x2016 table
Awarded Apr 15 '16 at 2:01
Professor Halfbrain and numbers with many zeros
Awarded Apr 12 '16 at 23:46
(post deleted or otherwise unavailable)
Awarded Apr 7 '16 at 19:25
A game with 330 pebbles
Awarded Apr 6 '16 at 16:28
(post deleted or otherwise unavailable)
Awarded Apr 6 '16 at 4:44
(post deleted or otherwise unavailable)
Awarded Apr 4 '16 at 21:06
A ship departs from Le Havre
Awarded Mar 31 '16 at 18:03
(post deleted or otherwise unavailable)
Awarded Mar 29 '16 at 4:14
Ten distinct numbers in the table
Awarded Mar 24 '16 at 17:45
The juggling magician
Awarded Mar 24 '16 at 17:45
Erasmus additions
Awarded Mar 24 '16 at 14:57
What's the boy's name?
Awarded Mar 22 '16 at 18:52
(post deleted or otherwise unavailable)
Awarded Mar 21 '16 at 19:38
Drinking beer in the pub
Awarded Mar 21 '16 at 9:38
A closed path on the Rubik's cube
Awarded Mar 19 '16 at 16:43
A golden weight of 11111 gram
Awarded Mar 19 '16 at 14:38
A man bought several liters of wine
Awarded Mar 19 '16 at 11:51
Toy boat on a string
Awarded Mar 17 '16 at 19:29
The frog concerto
Awarded Mar 17 '16 at 17:13
Evaporating coins
Awarded Mar 16 '16 at 15:32
A breathtaking way of making every possible positive integer
Awarded Mar 16 '16 at 6:19
The mysterious card in the middle
Awarded Mar 12 '16 at 2:26
Turning wine into water
Awarded Mar 11 '16 at 18:20
Two rooks for Bobby Fischer
Awarded Mar 9 '16 at 9:59
A truly amazing way of making every possible positive integer
Awarded Mar 9 '16 at 6:13
A man possesses a large quantity of stamps
Awarded Mar 7 '16 at 22:04
A truly amazing way of making the number 2016
Awarded Mar 7 '16 at 2:23
Professor Halfbrain's chessboard theorems
Awarded Mar 6 '16 at 18:51
A game with 52 cards
Awarded Mar 3 '16 at 22:10
The Erasmus 0-1 game
Awarded Mar 3 '16 at 10:36
Professor Halfbrain and the 99x99 chessboard (Part 2)
Awarded Mar 2 '16 at 23:28
Professor Halfbrain and the 99x99 chessboard (Part 1)
Awarded Mar 1 '16 at 18:16
The Erasmus polyhedron
Awarded Feb 19 '16 at 17:58
Ten girls around a table
Awarded Feb 18 '16 at 19:15
Ten thousand tiles
Awarded Feb 14 '16 at 18:11
The Non-Pythagorean Theorem
Awarded Feb 9 '16 at 17:13
Another village of liars and truth-tellers
Awarded Feb 9 '16 at 14:24
(post deleted or otherwise unavailable)
Awarded Feb 5 '16 at 15:02
Professor Halfbrain and the fantasy knight
Awarded Feb 1 '16 at 16:37
Removing chips from the table
Awarded Jan 27 '16 at 14:47
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