Inspired by Firemonkey:
If you go to the homepage, there are General IQ Test and Verbal IQ Test as well (besides Nonverbal IQ Test)
http://www.cerebrals.org/wp/tests/
General
Hardest IQ test: C-12*
Difficult IQ test: C-09*
Nonverbal
Figurative IQ test: JCTI* 15 – 74+ years
Matrix IQ test: TLAP-R*
Verbal
* Courtesy of Cogn-IQ.org