🏴☠️
Medium
#1
5 Pirates, 100 Coins
A greedy captain's dilemma
🧠Work backwards
🪙
Hard
#2
10 Pirates, 1 Coin
What happens when pirates outnumber coins?
🧠Count certain votes
👁️
Expert
#3
Blue-Eyed Islanders
100 villagers and a dangerous secret
🧠Common knowledge
🔫
Easy
#4
1 Bullet, 100 Prisoners
How one bullet controls one hundred people
🧠Cascade of rational fear
💡
Hard
#5
100 Prisoners & a Light Bulb
Can they coordinate without talking?
🧠Designate a counter
🗡️
Easy
#6
The 2 Guards Problem
One always lies, one always tells the truth
🧠Ask about the other guard
🎩
Medium
#7
100 Prisoners & Their Hats
Can they save 99 out of 100?
🧠Parity trick