Daniel McCartney is considered to be one of the great mental calculators of all time.

The great mental calculators: The psychology, methods, and lives of calculating prodigies, past and present.

Zerah Colburn was the first of several children known as "mental calculators."

Scott Flansburg is an American man often called a mental calculator.

George Lane (born 1964 ) is a British 'mental calculator' and author.

Aitken was one of the best mental calculators known, and had a prodigious memory.

Rüdiger Gamm is a mental calculator with no apparent disabilities whatsoever.

You could almost hear a whining sound as many mental calculators began operating at full capacity.

Priyanshi Somani (born 16 November 1998) is a mental calculator.

Law was a gambler and a brilliant mental calculator.