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Puzzling

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Awarded 7929 times.
Identical cubes in a sphere
Awarded yesterday
Find a more elegant explanation for the sequence 01, 10, 13, 20, 25, 30, 37, 40
Awarded 2 days ago
How many squares in a large square [closed]
Awarded 2 days ago
Can you arrange 25 whole numbers (not necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd?
Awarded Jul 2 at 16:30
Blindfolded tic-tac-toe with a twist
Awarded Jul 2 at 13:03
Can you arrange 25 whole numbers (not necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd?
Awarded Jul 2 at 10:40
Can you arrange 25 whole numbers (not necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd?
Awarded Jul 1 at 16:01
In a circular tray of radius 1, arrange coins of radius 1/2, 1/3, 1/4, 1/5 so that none of them can move independently
Awarded Jun 30 at 21:52
Strategy for solving "Hypatian Enigma" puzzle (all lines add to 38)
Awarded Jun 29 at 23:50
Reconstructing Euro results
Awarded Jun 28 at 6:01
A puzzle from YOU to ME ;)
Awarded Jun 27 at 15:51
Strategy for determining graph traversal rules yielding exactly one distinct graph traversal under every permutation [closed]
Awarded Jun 27 at 4:41
(post deleted or otherwise unavailable)
Awarded Jun 27 at 1:04
Numbers on a dartboard - we know why they are in that order but how was it calculated without computers?
Awarded Jun 26 at 10:48
Covering an 8x8 grid with X pentominoes
Awarded Jun 23 at 23:25
Finding a mystery number - with three logicians
Awarded Jun 23 at 14:06
What number completes the sequence? 2, 1, 7.5, ...,
Awarded Jun 22 at 14:48
(post deleted or otherwise unavailable)
Awarded Jun 20 at 7:10
3 doors guarded by 1 knight and 2 knaves
Awarded Jun 19 at 10:35
3 doors guarded by 1 knight and 2 knaves
Awarded Jun 18 at 17:51
Generalized knights and knaves puzzle
Awarded Jun 18 at 17:10
Rubik's Cube with no two squares of the same color on any horizontal, vertical or diagonal line
Awarded Jun 17 at 17:42
Progressive matrix puzzle with circles and dots
Awarded Jun 15 at 21:58
Unpaired socks in my lap
Awarded Jun 15 at 3:56
3³+4³+5³=6³ Puzzle
Awarded Jun 14 at 19:27
COMMENCE = 18251624, PRESERVE = 18323620, UNLAWFUL = what?
Awarded Jun 14 at 5:56
A 3 digit perfect square and its reverse are both perfect squares. What is the number?
Awarded Jun 14 at 1:16
Rats & Snakes: Avoid being eaten, escape unharmed
Awarded Jun 13 at 15:41
(post deleted or otherwise unavailable)
Awarded Jun 13 at 9:58
Culture Fair IQ Test
Awarded Jun 13 at 9:31
What is the maximum number of fish possible in your tank?
Awarded Jun 11 at 15:55
Cryptic Clue Explanation: Tree that's sported to keep visitors out at university (3)
Awarded Jun 11 at 13:50
What am I doing?
Awarded Jun 10 at 7:49
Leaders and Rulers
Awarded Jun 8 at 8:04
(post deleted or otherwise unavailable)
Awarded Jun 4 at 22:26
What's the one digit you can fill in this partially hidden Sudoku?
Awarded Jun 4 at 8:32
Making a multiplying magic square
Awarded Jun 2 at 21:08
(post deleted or otherwise unavailable)
Awarded Jun 2 at 20:57
Communicate square on a 3-by-3 grid by flipping precisely one of 13 coins
Awarded May 31 at 21:57
(post deleted or otherwise unavailable)
Awarded May 31 at 19:06
Can White still castle?
Awarded May 31 at 1:57
Make exactly 101 squares using as few lines as possible
Awarded May 29 at 5:28
2022 MIT Aquarium Hunt extraction for #6 and #8
Awarded May 23 at 16:33
Tile a square with five rectangles with 10 distinct edges
Awarded May 22 at 9:11
Why does the 4x4 Rubik's cube have parity cases, while the 3x3 does not?
Awarded May 22 at 4:10
Unsolved Mysteries: Kryptos
Awarded May 21 at 1:18
(post deleted or otherwise unavailable)
Awarded May 19 at 15:26
Block of characters with no spaces
Awarded May 18 at 2:47
(post deleted or otherwise unavailable)
Awarded May 17 at 1:06
Graph needed which satisfy both properties 1 and 2
Awarded May 16 at 21:26
(post deleted or otherwise unavailable)
Awarded May 14 at 20:08
(post deleted or otherwise unavailable)
Awarded May 13 at 14:46
Making 1353 using Four fours
Awarded May 12 at 20:42
How did White lose all their pieces?
Awarded May 12 at 12:08
(post deleted or otherwise unavailable)
Awarded May 9 at 23:41
(post deleted or otherwise unavailable)
Awarded May 9 at 17:18
Geometry Puzzle: Tangent Circles with Integer Radii
Awarded May 9 at 0:27
Graph needed which satisfy both properties 1 and 2
Awarded May 7 at 13:05
The Enigmatic Orbs
Awarded May 7 at 2:02
(post deleted or otherwise unavailable)
Awarded May 6 at 16:35
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