Set 1

Chameleons

Four Pills

Pebble Piles

Rope Escape

Cake Cutting

Fox in a Hole

Cube Cutting

Ant Collisions

Ant in a Room

Coin Toss Guess

Set 2

Cube Problems

Truchet Tilings

Treasure Island

Six Colored Balls

Josephus Problem

Forty-Five Minutes

Thousand Prisoners

Non-Transitive Dice

Blind Man and Cards

Breaking a Chocolate Bar

Set 3

Two Dice = Nine Cards

Three Boxes and a Ruby

Absent-Minded Professor

Color of My Probabilistic Hat

Kirkman's Schoolgirl Problem

Three Boxes with Two Balls Each

Divide 100 Marbles into Two Piles

Three Heavy and Three Light Balls

Tossing with One-Third Probability

Coins in a Row

Set 4

Ants in a Circle

Fifteen Sum

Four Ships

Cap Colors

f(f(x)) = -x

Card Shuffling

Coconut Spelling

Average Salary

Forks in a Road

Bigger or Smaller

Set 5

Measuring Weights

Working Computer

Tiling With Calissons

Loop in a Linked List

Perplexing Polynomial

Poisoned Wine Barrels

Two Eggs and a Building

Number Guessing Game

Cutting a Cake with Icing

Number Guessing Game II

Set 6

Cube Cutting with Stacking

What's the Number on My Hat?

Tiling a Chessboard with Dominoes

Tiling a Chessboard with Trominoes

Fuel Dumps on a Circular Racetrack

Red Card

My Cap Color

Twelve Coins

Grid Infection

Duplicate Integer

Set 7

Find the Angle

Five Card Trick

Sum and Product

Fast Bit Counting

Empty the Bucket

Balanced Coloring

Horses on Auction

Polya's Urn Process

Flipping Bits in a Matrix

Rectangle with Integer Side

Set 8

100 Prisoners and 100 Boxes

100 Prisoners and a Light Bulb

Firing Squad Synchronization

Four Points, Two Distinct Distances

Tumblers on a Rotating Table

Geometry With Only a Compass

Dijkstra's Self-Stabilization Protocol

Three NOT Gates from Two NOT Gates

© Copyright 2008—2019, Gurmeet Manku.