I did one
by finding a mensa test in the paper which didn't involve maths.
Then they send you a proper full test.
(
Amerella,
Tue 14 Jan 2003, 12:46,
archived)
and if you do that they invite you (if you get more than 132 on that one)
to come and sit in a proper examination style exam. And that one is what they base your IQ score on.
(on that one I got 168)
(
Professor Fnord Regius Professor of B3ta Chronology,
Tue 14 Jan 2003, 12:55,
archived)