Somebody mentioned that in England you get tested for IQ at age 11. Here in Australia where JJ has been all his life before BB there are no compulsory IQ tests, and I'd be buggered if JJ has ever taken one. I've never taken one, nor had the desire to (if you know anything about IQ tests you're intelligent enough to know how bunk they are).
So either 1) BB made all housemates do an IQ test and somehow the results were leaked, 2) the OP is just BS'ing, or 3) Perth FM are just BS'ing to get us to talk about it, because it's naturally going to be controversial with JJ having the highest IQ. I'll let you decide which
