Subcategory

Deduction Riddles

Part of Logic Riddles collection

Explore 20+ unique, interactive deduction riddles puzzles.

Use clues and eliminate possibilities to reach the correct answer. Sherlock Holmes-style logical deduction puzzles.

Interactive Riddle Challenge

Showing Deduction Riddles riddles
Hard +11 XP
The Truth Teller
On an island, knights always tell the truth and knaves always lie. A person...
23,055 solved Deduction Riddles
Hard +12 XP
The Two Guards
You face two doors: one leads to freedom, one to death. One guard always...
8,856 solved Deduction Riddles
Hard +11 XP
The Knights and Knaves
On an island, Knights always tell the truth and Knaves always lie. You meet...
19,325 solved Deduction Riddles
Hard +18 XP
The Train Schedule
Trains to City A leave every 10 minutes. Trains to City B also leave...
16,982 solved Deduction Riddles
Hard +10 XP
The Prisoner Freedom
A prisoner must choose between two doors. Behind one is freedom, behind the other...
9,520 solved Deduction Riddles
Hard +25 XP
The Hat Color Deduction
Three men stand in a line. Each wears a hat - either black or...
13,172 solved Deduction Riddles
Hard +23 XP
The Lying Day
On a mysterious island, people tell the truth on Monday, Wednesday, and Friday, and...
18,743 solved Deduction Riddles
Hard +16 XP
The Number Guesser
I am thinking of a number between 1 and 100. It is not prime....
12,361 solved Deduction Riddles
Hard +20 XP
The Coin and Box
There are three boxes: one has only gold coins, one has only silver, one...
8,008 solved Deduction Riddles
Hard +25 XP
The Four Card Problem
Four cards show A, K, 4, 7. Rule: If a card has a vowel...
5,916 solved Deduction Riddles
Easy +22 XP
The Bridge Puzzle
Two friends must cross a bridge. One can cross in 1 minute, the other...
7,777 solved Deduction Riddles
Medium +20 XP
The Truth About Liars
In a room of 100 people, 99 are liars and 1 is a truth-teller....
22,891 solved Deduction Riddles

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