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Puzzles and
Mental Activities
Since 1997

Puzzles &
Tests

Illusions &
Paradoxes

Oddities &
Curiosities

Puzzles, Tests, Math games, Brain-teasers, Tangram-like manipulatives, Mental tricks...

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Introduzione Magic experiments Do-it-yourself puzzle Fantastic Optical Illusions Perpetual calendar Knight's tour Vanish puzzle Prime finder About Math and Puzzles Weekly optical illusion features Puzzle Shop Fraction patterns Nine Dot problem Friends Numberopedia Puzzle activities & workshops Sponsor Curiopticals Laboratori Sitemap Cards Books Mastermind Workshops Pencil games What are you looking at TangraMagic Ostomachion FantaLogica Sudoku-like puzzles Illusions & Paradoxes Puzzle content for publishers Oddities & Curiosities Droodles Fibonacci numbers Create your own puzzle Best Teacher Monthly Puzzle Archimedes' Journal Latin wordplays Our Philosophy & Goals Alcuin's puzzles Tangram Puzzillusions Weekly features About us Five Room House Double-W puzzle Etymology of the word puzzle Abracada-brain Einführung Rules to Puzzle Solving Life Game Contact Mind & Brain

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Archimedes-lab.org is a volunteer-driven initiative. We rely on donations to achieve our mission - to inspire and motivate people with challenging mental activities.

Introduzione

Introduction

Einführung

Puzzles: rompicapo (It), casse-tête (Fr), rompecabezas (Sp), Denk- und Knobelspiele (Ger), quebra-cabeça (Por), breinbrekers (Du), hlavolamy (Cz), головоломки (Ru), חידה (He), σπαζοκεφαλιά (Gr), 智力游戏 (Ch), パズル (Jap).

Train your brain with clever puzzles!
We believe that you came to this braintainment site because you love doing puzzles and brain teasers and that you enjoy wrestling with logic and geometry problems. You lucky folks, research says it's good for you; brain games and mental activities keep your brain young and active. Think about it: even though the brain comprises only about 2% of the total body weight, it receives 15-20% of the body's blood and oxygen supply. And that means a lot!

    A word on Math & Perception puzzles
    Tips for solving puzzles
    Our Philosophy and Goals
    The Best Teacher I ever had

	Sunday Puzzle Solve it & win a badge Rompicapo domenicale Casse-tête du dimanche
	Create your own Build your own puzzle and try hundreds of activities
	Numberopedia What’s special about this number?

*What's new*
NEW! Take a visit to our amazing Puzzle Archive. The biggest puzzle and brainteaser collection!
TangraMagic: the new Tangram puzzle with a touch of magic that will surprise your intellect and challenge your creativity!	Most wanted puzzle solutions: Nine Dot problem, Five Room House brainteaser, Double-W puzzle.
Work out our latest intriguing Pencil games of the month	Challenge new Knight's tour puzzles & graphs
Resolve our Abracada-brain twisters (En, It, Fr, Es)	Weekly 'paint by number' and Sudoku-like puzzles
*Visitor favorites*
Perform online Magic experiments	Investigate the Fibonacci numbers on your PC
Face original mind challenges of the Tangram puzzle	Discover Latin wordplays or the Ostomachion
Figure out how the magic Vanish puzzle works	Download our free Do-it-yourself puzzle (PDF)

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Browse our top puzzle resources

Boost your imagination by solving Droodles

Work out the Alcuin's puzzles in the original Latin!

Check any prime number with our Prime finder

Simulate artificial life with Life Game cellular automaton

Find the day for any date with the Perpetual calendar

Wonder exactly what the etymology of 'Puzzle' is?

Rediscover the Monty Hall Dilemma!

Explore some curious Fraction patterns

Programs & Events

Friends & Partners

For publishers

Challenging online games ready to play


Connect4	MasterMind	Solitaire	15Puzzle	Nim	Reversi	Domino	Flippo


A large collection of brain teasers* and mechanical puzzles for you to solve or to offer and challenge your friends and family.* Take a look!	Find unique merchandise with our puzzles and optical illusion art on posters, postcards, t-shirts, mugs, and more. Take a look!	A great selection of compelling books that keep you amused for hours and that help develop logic as well as critical thinking skills! Take a look!	Meet G. Sarcone, the author of Archimedes Lab, on his website dedicated expressely for publishers & content acquirers seeking original publishing and editorial projects. Take a look!

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Puzzles & mental activities that enhance critical and creative thinking skills
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