IQ test. You failed.Kidding!Maybe they're seeking US citizens to work a London internship, for evaluation purposes, with a view to hiring them permanently for the US practice? You know, take them outta their element, throw a few curve balls and see how they cope with the pressures...Yep, far fetched, I know.I'd pick up the phone and call BCG, assuming the responses on here don't get any more helpful. lol ;-)