Moreover, Mr Gamm, who is now 26, was not born with this computing ability.

ECONOMIST: Who wants to be a genius?

Offering everything from sturdy perennials to hardwood gazebos and citronella flares, brands such as Truffaut, Jardiland and Gamm Vert have taken root.

ECONOMIST: A new business sprouts up in France

The GAMM was first proposed in 2005 when the UK held the presidency of the EU and Mr Clarke was home secretary.

BBC: Warning over 'anarchy' in migration policies

Both Mr Gamm and the controls showed activity in 12 parts of the brain, but in five additional areas, Mr Gamm alone showed any activity.

ECONOMIST: Who wants to be a genius?

In other respects, Mr Gamm's brain does not appear notably unusual.

ECONOMIST: Who wants to be a genius?

Gamm Vert has expanded its retail space by 20% since 2001.

ECONOMIST: A new business sprouts up in France

The committee hearing on 18 July 2012 was focusing on the EU's Global Approach to Migration and Mobility (GAMM), which is the union's overarching framework on migration policies.

BBC: Warning over 'anarchy' in migration policies

Mr Gamm appeared to be using his long-term memory to store the working results that he needed to complete his calculations for example, all the dividends and remainders of a division sum.

ECONOMIST: Who wants to be a genius?