GREAT IQ LINKS 

FILBERT'S FIND THE MISSING LINK QUIZ -  
General knowledge quizes, regularly updated,  
and offering prizes !
2H.com -  
further links to IQ tests 
& more for you to explore!
THE GREAT ENIGMA CHALLENGE -  
A collection of entertaining puzzles to
test all your brain faculties.
BRAINBASHERS -  
Exciting puzzles - logic puzzles, math puzzles, language puzzles
and paradoxes for all puzzlaniacs.