(This question was previously posted on Math SE, but received no answers.) 3D infected cubes puzzle with threshold $4$: On an $n\times n\times n$ cube, some cells are infected; if a cell shares a face with $4$ infected squares, it becomes infected. What's the minimum number of initially infected...

You can consider this a "warmup" to my other question about infected squares. On a $7\times7$ square, some cells are infected; if a cell shares an edge with $3$ infected squares, it becomes infected. Show that we can infect the whole square with only $21$ initially infected cells.

This horrible person tricked me into marrying them after a couple months. (My dumbass fault) With the intent to steal everything from my daughter and I. She abused both of us mentally and physically. All while having a criminal relationship with my daughter's mother and failed to tell me. Also ha...

This puzzle is part of the Puzzling Stack Exchange Advent Calendar 2022. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door 'Twas the night before Christmas 1802, and Thomas Young was conducting his now famous double-slit experiment. It was the first...

I'm back with another holiday rebus!!! This one is slightly more confusing, but you guys will figure it out, I'm sure.