For example, in the United Kingdom, white-van men and fashion models are commonly thought to be less intelligent, whilst doctors and scientists are expected to score highly.

The TV format has been sold in other countries like: Czech Republic, Denmark, Indonesia, Norway, Turkey and in the Middle East on the Arabic channel MBC1.

The BBC tests were devised and standardised by the academic Colin Cooper, of Queen's University Belfast, who was sometimes referred to on the programme as 'Sooperman Cooperman'.

They were pitted against a group of 10 celebrities including EastEnders star Adam Woodyatt, pop music presenter Jayne Middlemiss, Olympic athlete Jonathan Edwards and former Sunday Times editor and broadcaster Andrew Neil.

The last IQ test in the UK was shown on 27 August 2007, when the studio groups were reality show contestants, clairvoyants, surgeons, removal men, Robinsons, Wallaces and celebrities.

Experts who joined Dr Colin Cooper on the IQ test panel have included Sylvia Herbert, a director of British Mensa (2002 and 2003) and Baroness Susan Greenfield, scientist and polymath (2004).

A trial version of the application appeared prior to the first quiz night, featuring 12 questions on a number of topics, including the Birmingham Six, the former occupants of the Grafton Street site now occupied by Brown Thomas, and which Irish alcohol company Salvatore Schillaci advertised for.

As opposed to the BBC system of division by nearest city (which let people in Ireland enter if they chose Belfast), RTÉ divide results by historical Irish county.

As well as historical Irish counties, other questions asked for demographic division included the participants preference for tea or cappuccino, and their support for Roy Keane or Mick McCarthy during The Saipan Incident.

Celebrities that had their IQ's tested included Justin Trudeau, Dragon's Den's W. Brett Wilson and Our Lady Peace's Jeremy Taggart.

Test the Nation: Trivia featured celebrities: Farley Flex, Debbie Travis, Lorne Cardinal, Carlo Rota, Samantha Bee and Tricia Helfer.

Test the Nation: Sports celebrity guests are Paul Coffey, Debra DiGiovanni, Alan Thicke, Brian Bailey, Victoria Pratt and Chris Murphy.