User Will.Octagon.Gibson - Puzzling Stack Exchange

17 votes

4 answers

2k views

An Almost-squarish set of numbers

asked May 31, 2023 at 23:49

17 votes

2 answers

3k views

Can a standard Sudoku puzzle contain a miniature Sudoku puzzle?

asked Jul 18, 2023 at 19:01

17 votes

2 answers

796 views

Can you find a grand tour of the rooms in this 12x12 grid?

asked Sep 27, 2024 at 8:10

17 votes

2 answers

3k views

Can you arrange ABCD...Z into a straight line so that consecutive letters of the alphabet have an odd number of letters between them?

asked Oct 7, 2024 at 6:23

17 votes

3 answers

3k views

Trying to guess (as closely as possible) an unknown number X which is an integer between 1 and 100

asked Mar 11 at 5:10

17 votes

2 answers

2k views

Unneighbourly circuit. Is there a closed rook tour on a 4x4 chessboard where the rook never moves to an adjacent square?

asked Apr 8 at 4:54

17 votes

3 answers

901 views

Can you find sets of 4 (or 5) positive integers such that their pairwise sums give consecutive numbers?

asked Apr 19 at 5:59

16 votes

3 answers

3k views

Who wins this chocolate bar breaking game?

asked Oct 9, 2024 at 6:14

16 votes

1 answer

2k views

Do Langford squares exist?

asked Mar 28, 2023 at 19:16

16 votes

1 answer

2k views

How does half a dozen remain?

asked Jan 14, 2024 at 5:13

16 votes

2 answers

2k views

Find the heaviest and the second heaviest coins

asked Feb 26, 2024 at 20:17

16 votes

1 answer

1k views

Can we find four identically colored numbers?

asked May 22, 2024 at 2:49

16 votes

3 answers

4k views

Make exactly 101 squares using as few lines as possible

asked May 27, 2024 at 21:40

15 votes

4 answers

993 views

Fill the grid subject to product, sum and knight move constraints

asked Jul 7, 2024 at 7:41

15 votes

9 answers

4k views

Starting with 2014 "+" signs and 2015 "−" signs, you delete signs until one remains. What’s left?

asked Sep 8, 2024 at 6:31

15 votes

7 answers

3k views

Join six cities with roads

asked Feb 10, 2024 at 23:21

15 votes

4 answers

822 views

Which positive integers have at least one positive integer multiple such that the base 10 representation of that multiple has only even digits?

asked Jul 19, 2023 at 8:05

15 votes

1 answer

1k views

Additions to menagerie were strange but appreciated

asked Oct 3, 2023 at 8:43

15 votes

3 answers

1k views

What is the greatest possible number of empty squares that could remain after the jumps? [duplicate]

asked Sep 29, 2024 at 7:01

15 votes

4 answers

3k views

What is the smallest interval between two palindromic times on a 24-hour digital clock?

asked Sep 23, 2024 at 7:34

15 votes

2 answers

2k views

London Bridge is _

asked Feb 26 at 22:15

15 votes

1 answer

725 views

Minimize the number of pieces in the cube that you build

asked Nov 3, 2024 at 21:45

15 votes

5 answers

2k views

Can you make 5 x 3 “magic” rectangles?

asked Nov 25, 2024 at 23:21

15 votes

2 answers

2k views

Can you construct a 3x3x3 cube using 9 red, 9 green and 9 blue unit cubes such that there is no “line” of 3 unit cubes that are all the same color?

asked Apr 14 at 5:50

14 votes

1 answer

1k views

Hey, take a break from the movie and solve this riddle

asked Mar 19 at 4:47

14 votes

3 answers

2k views

Who wins this match removal game?

asked Oct 9, 2024 at 20:13

14 votes

4 answers

3k views

Can a knight capture all 16 pawns in 16 consecutive moves?

asked Oct 19, 2024 at 22:59

14 votes

3 answers

2k views

Putting stones into bags

asked Oct 17, 2023 at 1:42

13 votes

1 answer

755 views

Which one is 10?

asked Dec 15, 2023 at 20:23

13 votes

3 answers

607 views

Packing a 3x3x3 cube with three congruent polycubes

asked Dec 20, 2023 at 10:31

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243 Questions

An Almost-squarish set of numbers

Can a standard Sudoku puzzle contain a miniature Sudoku puzzle?

Can you find a grand tour of the rooms in this 12x12 grid?

Can you arrange ABCD...Z into a straight line so that consecutive letters of the alphabet have an odd number of letters between them?

Trying to guess (as closely as possible) an unknown number X which is an integer between 1 and 100

Unneighbourly circuit. Is there a closed rook tour on a 4x4 chessboard where the rook never moves to an adjacent square?

Can you find sets of 4 (or 5) positive integers such that their pairwise sums give consecutive numbers?

Who wins this chocolate bar breaking game?

Do Langford squares exist?

How does half a dozen remain?

Find the heaviest and the second heaviest coins

Can we find four identically colored numbers?

Make exactly 101 squares using as few lines as possible

Fill the grid subject to product, sum and knight move constraints

Starting with 2014 "+" signs and 2015 "−" signs, you delete signs until one remains. What’s left?

Join six cities with roads

Which positive integers have at least one positive integer multiple such that the base 10 representation of that multiple has only even digits?

Additions to menagerie were strange but appreciated

What is the greatest possible number of empty squares that could remain after the jumps? [duplicate]

What is the smallest interval between two palindromic times on a 24-hour digital clock?

London Bridge is _

Minimize the number of pieces in the cube that you build

Can you make 5 x 3 “magic” rectangles?

Can you construct a 3x3x3 cube using 9 red, 9 green and 9 blue unit cubes such that there is no “line” of 3 unit cubes that are all the same color?

Hey, take a break from the movie and solve this riddle

Who wins this match removal game?

Can a knight capture all 16 pawns in 16 consecutive moves?

Putting stones into bags

Which one is 10?

Packing a 3x3x3 cube with three congruent polycubes