11 questions linked to/from Who killed the indiscriminate warden?
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### Three mathematicians are forever in Prison

I'm excited to share the following riddle. It was given to me more than two years ago and I finally solved it last summer (after not thinking about it for a long time). In my desperation, I tried to ...
28k views

### Hats and Aliens

Here's a neat little puzzle taken from a Google interview question: 10 humans are abducted by aliens; each represents 10% of the entire human population. The aliens give each abductee either a ...
41k views

### What is the maximum number of solutions a Sudoku puzzle can have?

I've seen Sudoku puzzles that can be solved two different ways. Referring to a traditional 9x9 grid: Is it possible for a Sudoku puzzle to have more than two solutions? If so, what is the maximum ...
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### Which switch goes to which bulb?

You are in a room with three switches, labeled $A$, $B$, and $C$. Initially, each switch is in an off state. In an adjoining room, there are three incandescent light bulbs. Your task is to ...
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### How long has the warden been the warden?

Summary: It is your first day in prison serving a literal life-sentence under the supervision of the warden. You are to be kept in solitary confinement with no additional information for the ...
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### Don't clear your terminal history

You woke up this morning locked in a room. The only apparent exit is a door with a terminal. On the screen you see the following: ...
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### Prison Pizza Party

You are an inmate at Infinity Prison, where prisoners must work together to solve a challenging riddle every day to ensure their very survival. But today is your lucky break; the warden has decided to ...
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### The Two Switches

11 prisoners arrive at a jail. But this jail is not an ordinary jail, it's a jail whose Warden despises ignorance and reveres wisdom. So much so, that the Warden is willing to free the group of ...
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### One hundred and one hats

You are a prisoner. One day, the Warden summons you and ninety-nine others to see his hat collection. "Bowlers and baseball caps. Stensons and sombreros. One hundred and one headpieces, each unique ...