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Top Questions
30
votes
Are you radical enough to solve this SURDOKU?
mathematics
logical-deduction
calculation-puzzle
grid-deduction
sudoku
asked Jul 8 at 21:12
puzzling.stackexchange.com
28
votes
Where is the large cook promotion?
enigmatic-puzzle
calculation-puzzle
asked Apr 9 at 0:27
puzzling.stackexchange.com
27
votes
Make the number 606 50 percent bigger
mathematics
lateral-thinking
asked Apr 21 at 8:43
puzzling.stackexchange.com
27
votes
Can you tile a 25 x 25 square with a mixture of 2 x 2 squares and 3 x 3 squares?
mathematics
geometry
tiling
asked Apr 18 at 5:31
puzzling.stackexchange.com
27
votes
12 piece cube packing puzzle
mathematics
geometry
three-dimensional
packing
asked Jul 5, 2023 at 6:01
puzzling.stackexchange.com
25
votes
Twenty-four trees in eighteen rows of four
mathematics
geometry
asked May 30, 2022 at 21:11
puzzling.stackexchange.com
25
votes
Tiling a square with right-angled triangles
tiling
asked Feb 1 at 0:05
puzzling.stackexchange.com
23
votes
You are at a crossroads with five roads leading away from it
optimization
coin-tossing
asked Dec 31, 2023 at 4:57
puzzling.stackexchange.com
23
votes
What’s the highest salary the greedy king can arrange for himself?
mathematics
optimization
asked Jun 30 at 6:52
puzzling.stackexchange.com
22
votes
Can you find a 3x3 white square somewhere in this relatively prime graph?
mathematics
number-theory
asked Sep 19, 2023 at 8:51
puzzling.stackexchange.com
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next
Top Answers
80
What are some conjectures of your own?
math.stackexchange.com
50
Is this Hashi puzzle unsolvable?
puzzling.stackexchange.com
50
4,4,2,6,2,10,4,_ sequence from 4th grade packet
puzzling.stackexchange.com
22
Are there always 2 teams such that they have together defeated every other team
puzzling.stackexchange.com
18
Move exactly two matches to make the two sides equal
puzzling.stackexchange.com
18
Make 27 using 1, 1, 1, 1
puzzling.stackexchange.com
17
What are some obscure radical identities?
math.stackexchange.com
17
Chem-is-try is hard
puzzling.stackexchange.com
13
Interesting irrational number
puzzling.stackexchange.com
10
Minor mistake in setup, no time to redo it. OK to publish anyway?
academia.stackexchange.com
9
Which positive integers have at least one positive integer multiple such that the base 10 representation of that multiple has only even digits?
puzzling.stackexchange.com
8
VI or LVE, answer is half a dozen
puzzling.stackexchange.com
8
Knights, Knaves, and Spies
puzzling.stackexchange.com
7
Numbers that are averages of their digits
puzzling.stackexchange.com
6
General attacking chessboard squares
puzzling.stackexchange.com
6
Make 38 using the least possible digits 8
puzzling.stackexchange.com
6
Make the three products equal and as large as possible
puzzling.stackexchange.com
5
Does rearranging a function change its domain?
math.stackexchange.com
5
How many digits can be removed from a division puzzle?
puzzling.stackexchange.com
5
Let’s make a huge number with only tiny numbers (pt2)
puzzling.stackexchange.com
5
The shady puzzle that will keep you in the dark
puzzling.stackexchange.com
5
Binary Grid Challenge and X & O Conundrum
puzzling.stackexchange.com
5
Find a more elegant explanation for the sequence 01, 10, 13, 20, 25, 30, 37, 40
puzzling.stackexchange.com