User Will.Octagon.Gibson - Puzzling Stack Exchange

8 votes

3 answers

730 views

Seven genuine and two fake coins

asked Jan 19, 2024 at 20:39

8 votes

1 answer

578 views

Tiling a 5x5 square with five pentominoes AND a Latin square

asked Jul 11, 2022 at 4:03

8 votes

2 answers

1k views

Number of divisors equals square root

asked Jul 20, 2022 at 20:36

8 votes

2 answers

1k views

What are the hidden digits in this long division puzzle?

asked Aug 29, 2022 at 8:25

7 votes

1 answer

549 views

Find all integers n such that $\sqrt{n-4 \sqrt{n-19}}$ is also an integer

asked Jul 31, 2022 at 21:54

7 votes

8 answers

2k views

9 trees in 7 rows with 3 trees in each row

asked Aug 23, 2023 at 23:03

7 votes

1 answer

298 views

They used to sing together

asked Mar 24, 2024 at 5:31

7 votes

2 answers

419 views

Product = Sum Sudoku (Royal Statistical Society Christmas Quiz 2023)

asked Mar 15, 2024 at 18:08

7 votes

1 answer

418 views

Polyomino equation

asked Oct 21, 2023 at 8:40

7 votes

1 answer

1k views

Six-sevenths of a million this sum I’ll maintain. How is this possible?

asked Jan 15, 2024 at 10:07

7 votes

1 answer

630 views

Fill this Sudoku variant so that the sums of numbers in the outlined regions are all different

asked Sep 16, 2024 at 5:04

7 votes

2 answers

427 views

Perfect squares cross-number

asked Aug 27, 2024 at 6:33

7 votes

1 answer

731 views

Swap the positions of the 4 chess knights

asked Jul 20, 2024 at 3:29

7 votes

1 answer

625 views

Rearrange these numbers and symbols to make a true equation

asked Aug 20, 2024 at 21:41

7 votes

3 answers

3k views

How can 4 chess queens attack all empty squares on a 6x6 chessboard without attacking each other?

asked Jul 21, 2024 at 20:15

7 votes

4 answers

1k views

When Beatrix stops placing dominoes on a 5x5 board, what is the largest possible number of squares that may still be uncovered?

asked Aug 3, 2024 at 22:12

7 votes

2 answers

667 views

A simple cross-number puzzle

asked Apr 28, 2024 at 4:50

7 votes

6 answers

1k views

“Afterlife” Sudoku puzzle

asked Mar 24 at 3:28

7 votes

2 answers

1k views

7 x 7 Ripple Effect puzzle

asked Jan 29 at 4:18

7 votes

1 answer

317 views

7 x 7 Star Battle puzzle

asked Feb 2 at 6:26

7 votes

2 answers

362 views

“Pandigital” rectangular block alphametic

asked Feb 15 at 21:05

7 votes

2 answers

298 views

What are the possible triangular sums?

asked Nov 22, 2024 at 21:02

7 votes

1 answer

658 views

Prove that no matter how the points are colored that there is an isosceles triangle inscribed in the circle whose vertices are all the same color

asked Oct 3, 2024 at 5:59

7 votes

1 answer

374 views

In this "alphametic rebus", what number is TWO?

asked Oct 30, 2024 at 19:04

7 votes

1 answer

458 views

Given that the sum on one of the squares is 3 cents, and on another one 17 cents, find the total amount of money on both diagonals of the checkerboard

asked Oct 22, 2024 at 5:17

7 votes

2 answers

764 views

Fill the circles to ensure all six triangular sums are equal

asked Oct 16, 2024 at 21:47

6 votes

1 answer

158 views

Dissect the given shape into 4 congruent pieces each containing 2 circles and 1 square

asked Oct 20, 2024 at 8:19

6 votes

1 answer

869 views

Fill the 4x4 grid with numbers to make eight arithmetic progressions

asked Nov 13, 2024 at 4:25

6 votes

1 answer

483 views

6 x 6 Sashigane puzzle

asked Jan 17 at 6:31

6 votes

1 answer

221 views

Fill this partially-dotted Sudoku so that two sums are equal

asked Dec 27, 2024 at 7:09

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243 Questions

Seven genuine and two fake coins

Tiling a 5x5 square with five pentominoes AND a Latin square

Number of divisors equals square root

What are the hidden digits in this long division puzzle?

Find all integers n such that $\sqrt{n-4 \sqrt{n-19}}$ is also an integer

9 trees in 7 rows with 3 trees in each row

They used to sing together

Product = Sum Sudoku (Royal Statistical Society Christmas Quiz 2023)

Polyomino equation

Six-sevenths of a million this sum I’ll maintain. How is this possible?

Fill this Sudoku variant so that the sums of numbers in the outlined regions are all different

Perfect squares cross-number

Swap the positions of the 4 chess knights

Rearrange these numbers and symbols to make a true equation

How can 4 chess queens attack all empty squares on a 6x6 chessboard without attacking each other?

When Beatrix stops placing dominoes on a 5x5 board, what is the largest possible number of squares that may still be uncovered?

A simple cross-number puzzle

“Afterlife” Sudoku puzzle

7 x 7 Ripple Effect puzzle

7 x 7 Star Battle puzzle

“Pandigital” rectangular block alphametic

What are the possible triangular sums?

Prove that no matter how the points are colored that there is an isosceles triangle inscribed in the circle whose vertices are all the same color

In this "alphametic rebus", what number is TWO?

Given that the sum on one of the squares is 3 cents, and on another one 17 cents, find the total amount of money on both diagonals of the checkerboard

Fill the circles to ensure all six triangular sums are equal

Dissect the given shape into 4 congruent pieces each containing 2 circles and 1 square

Fill the 4x4 grid with numbers to make eight arithmetic progressions

6 x 6 Sashigane puzzle

Fill this partially-dotted Sudoku so that two sums are equal