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Jim Loy's Puzzle Page

Also see my Mathematics pages.

My puzzle pages have been chosen, by Learning in Motion, as one of the top ten educational sites on the WWW (for October 2000).

I received this email:

I discovered your site looking for info on Figure Logic puzzles. It's very nice! I am a pretty capable puzzle solver. It is because of you, I think, that I have become such a fan of Word Arithmetic. I am now more willing to make a table and guess things. Thank you for existing!

Number Puzzles:

• Classic puzzles:
  • 123456789 = 100 NEW
  • Archimedes' Cattle Problem NEW
  • Number Magic
  • Four Fours
  • Eight Loaves of Bread
  • The Fly and the Bicycles
  • Wheat on a Chess Board
  • The Father's Will
  • St. Ives
  • The Tower of Hanoi
    • Tower of Hanoi Animation
  • Chinese Rings NEW
  • The Missing Dollar
  • Nim in my Mathematics pages
  • A Clock Puzzle
  • The High Low Game
• More recent puzzles:
  • . . . 6
  • A Couple of Mensa Puzzles
  • The Case of the Missing Divisor
  • Sally's Age
  • Eve Did Talk
  • Figure Logic
  • Sum of n Consecutive Integers in my Mathematics pages
  • Not Much of a Puzzle
  • Word Arithmetics:
    1. Solving Word Arithmetics (the basics)
    2. Advanced Word Arithmetics
    3. Word Arithmetics - part 3
    4. Word Arithmetics - part 4
    5. Word Arithmetics - Advice By eMail
    6. Word Arithmetics - Part 6
    7. Word Arithmetics - Part 7
    8. Word Arithmetics - Part 8 (a tough one)
    9. Word Arithmetics - Impossible? NEW
  • Cross Sums
    1. Solving Cross Sums
    2. My Cross Sums
    3. Assume there are No Typos?
  • Number Place
  • Word Problems in my Mathematics pages
  • Combination Locks in my Mathematics pages
  • 1999 (in my Mathematics pages)
• My original puzzles:
  • My Bill and George Acceleration Puzzle
  • My Equation in my Mathematics pages
  • ABCD x E=DCBA
  • A Simple Number Puzzle (for kids)
  • My Three Numeric Palindromes

Geometric Puzzles:

• Classic puzzles:
  • Some Matchstick Puzzles NEW
    • A Flawed Matchstick Puzzle NEW
  • Some Optical Illusions NEW
    • Some Impossible Objects NEW
    • Some Ambiguous Objects NEW
    • Some Lunar Optical Illusions NEW
    • Some Optical Delusions (also in my Humor pages) NEW
  • Dissections:
    • Rectangle to Square Dissection NEW
    • The Perfect Square Dissection
    • The T Puzzle
    • Only Six Cuts? NEW
    • Trisecting a Square NEW
  • Five Tetrahedra
  • Difficult?
  • The Napkin Ring
  • Malfatti's Conjecture in my Mathematics pages
  • The Area of a Crescent
  • Three Cups
  • The Hole in the Postcard
  • Wrong Triangle
  • Parallelogram? in my Mathematics pages
  • The Coin Paradox
  • The Bookworm
  • Nine Dots
  • Ladder Problems
    • The Crossed Ladder Problem
    • Another Ladder Problem
    • Yet Another Ladder Problem
  • The Spider and the Fly
  • A Cable Around the World
  • What Color Was the Bear?
  • The Travelling Salesman Problem in my Computer pages
  • Dominoes On a Checker Board
  • An Impossible Block?
  • Cans in a Box (packing circles into a square)
  • The Extra Square
  • Tangram
  • The Bridges of Königsberg
  • An Impossible Puzzle?
  • A Leaning Tower
  • Pulleys and Gears
  • Twisted Wire Puzzles
  • Mazes
    • Sam Loyd's Back from the Klondike (also listed below)
    • Beat the Clock Mazes (a Book Review)
    • My Maze (also listed below)
  • A Little-Known Jigsaw Puzzle Clue
  • Life in my Games pages
  • Puzzles by Sam Loyd:
    • Sam Loyd's Get Off the Earth
    • Sam Loyd's 15 Puzzle
    • Sam Loyd's Back from the Klondike NEW
    • Tangram (also listed above)
• More recent puzzles:
  • A Maximum Area NEW
  • Iso-Metrics NEW
  • Sliding Along Circles
  • Stereograms
  • David Coles' Triangle Puzzle
  • Math Maze
• My original puzzles:
  • My Equilateral Triangle Puzzle
  • My Three Triangle Puzzle
  • My Maze
  • A Small Puzzle
  • My Snow and Wind Problem
  • Cylinder Problem

Logic Puzzles:

• Classic puzzles:
  • The Monty Hall Trap (one of my most popular pages, also listed in Probability Puzzles below)
  • Cannibals and Missionaries, etc.
  • The Drawer Full of Socks
  • The Governor of Kgovjni NEW
• Others:
  • Bowling Playoffs
  • Who Are Bill and Susan?
  • Logic Problems (also in my Logic pages)
  • Amateur Logician Night in my Logic and Humor pages

Word Puzzles:

• Classic puzzles:
  • The Riddle of the Sphinx
  • The Famous Beale Cipher
• Others:
  • Solving Cryptograms
  • The Pigpen Cipher
  • Padlocks and Cryptography
  • My Simple Cipher
  • Can Y@@ou D%ecry*pt This?
  • Unbreakable Ciphers in my Mathematics pages
  • Various Histories of Codes and Ciphers (book review)
  • Between Silk and Cyanide - by Leo Marks (book review)
  • Palindromes - various collections in my Book Reviews

Probability Puzzles:

• Classic puzzles:
  • The Monty Hall Trap (one of my most popular pages)
  • Non-Transitive Dice NEW

Trivia:

• USA States Trivia

Chess and checkers:

• My Chess Problem
• Loy's Checkers Problems (takes a while to load)
• Easy Checkers Problems
• Jim's Endings (checkers)
• A Tribute to Matt Long (checkers)
• The 197 Years Problem (checkers)
• The Phantom Fox Den (checkers)
• World's Greatest Checkers Puzzle?

Other links:

• Dave Coles' Triangle Game (rules, diagrams, my contributions) (also see my page: David Coles' Triangle Puzzle)
• Download X-Sums 98 Cross Sums demo
• Enigma machine simulations:
  • The Enigma Machine (requires Java)
  • Enigmaco.de (requires free Flash5 plugin)
  • Enigma - Windows downloads (and other encryption machines)
• Brain Teasers by Barry R. Clarke
• D&B Puzzles
• Bits And Pieces
• Akio Kamei's World of Karakuri Trick Boxes
• Puzzle Japan
• Puzzle Games Directory
• Jessica Fridich's Speed Cubing Page (Rubik's Cube)
• curiouser.co.uk
• Riddles (and puzzles)
• Puzzle Playground
• Aha! Puzzles
• Wrebbit.com - Puzz 3D
• The Magic Seal
• Puzzle Master inc.
• A1 Puzzles
• Hexip (hexagonal battleships)
• Rob's Puzzle Page
• Nick's Mathematical Puzzles

There are lots more, including a lot of puzzles using Java.

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