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Browsing Riddles in Hard

C is for Cookie

Chess Problem

Don’t Flip Out, Square!

Don’t Hold Your Horses: Race ‘em!

Fun with Geometry

Fun with Geometry II

General Code

Gonna Make Your Brown Eyes Blue

Great EXPectations

How Can You Guess That?

Is this Seat Taken?

Legal 21, Officer

Mad as a Hatter

Safe Generals

Sum Things are Products of Twisted Minds

The Mathematician and the Pea

Three Hats and a Strange Probability

Tiling Rectangular Boxes

Year Today, Gone Tomorrow?

You’re Caught–Stop Your Whining

Riddles

  • —Difficulty
    • +Easy
    • +Medium
    • —Hard
      • C is for Cookie
      • Chess Problem
      • Don't Flip Out, Square!
      • Don't Hold Your Horses: Race 'em!
      • Fun with Geometry
      • Fun with Geometry II
      • General Code
      • Gonna Make Your Brown Eyes Blue
      • Great EXPectations
      • How Can You Guess That?
      • Is this Seat Taken?
      • Legal 21, Officer
      • Mad as a Hatter
      • Safe Generals
      • Sum Things are Products of Twisted Minds
      • The Mathematician and the Pea
      • Three Hats and a Strange Probability
      • Tiling Rectangular Boxes
      • Year Today, Gone Tomorrow?
      • You're Caught--Stop Your Whining
    • +Very Challenging
  • —Topic
    • +Geometry
    • +Combinatorics
    • +General
    • +Algebra
    • +Probability
    • +Games
    • +Number Theory
    • +Logic
    • +Hat

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