Knights and Liars

There are two types of inhabitants on the Island of Knights and Liars. Knights always tell the truth. Liars always lie.

Start: You ask two people you meet on the Island…
JuniorMathematics
Algebra · Knights and Liars

Start solving

Pick a puzzle below — each one has an interactive simulator you can play right away.

Start: You ask two people you meet on the Island…
Interactive puzzles
5 puzzles in this collection
You ask two people you meet on the Island, Tom and Tim, if they are Knights. Tom
While visiting the Knights and Liars Island, you had a conversation with a local
Andy and Ben live on the Island of Knights and Liars. Andy says: “We are both li
Alice and Bob live on the Island of Knights and Liars. Alice says: “We are the s
Three citizens are passing by. You ask these three inhabitants: "How many among

There are two types of inhabitants on the Island of Knights and Liars:

Learn the methodRead guide

There are two types of inhabitants on the Island of Knights and Liars:

Knights always tell the truth

Liars always lie

You are visiting this island and to survive you need to distinguish between Liars and Knights. Luckily, you can ask them questions, and the native inhabitants always answer you!