So we watched Test the Nation last night. I did the test online, and came up with an IQ of 121. Then we did it on TV, and I ended up with 137. I think the 121 is probably more honest–some of the questions were easier the second time around, since I knew, for instance, what they were going to ask for the memory questions, and could plan accordingly.
Interested in taking the test? Go to http://www.cbc.ca/testthenation/ and try it out there.