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Intelligence

Category Trees
Science


big letters = gem
bold = recommended
italic = megasite


Brain Teasers (Multiple)

Brain Bashers
Cognitive Labs Cool Math Games


Brain Teasers (Single)

The Genius Test


Leagues / Tournaments

Ishtmian Games


Online IQ Tests (Single)

IQ Test Labs
IQTest.com The Free IQ Test


Organizations

GenerIQ Society
Exactiq Eximia
World Intelligence Network
Pars Society
British Mensa
Colloquy ePiq International High IQ Society Mensa International The Prometheus Society


Resources

Speedcubing.com


Software

Go IQ Test


Sites written in big letters are the very best sites on the internet and a must see.


Sites written in bold letters are recommended for their excellent online content that's completely free.


Sites written in italic letters are megasites.


Sites with a slash over the site name have recently experienced severe downtime and may still be down.


The sites are sorted by where the site / subject matter is based (flag).


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