David Hilbert? Mary Winston Newson? Adolphe Quetelet? Joseph Diez Gergonne? Michel Chasles? William Spottiswoode? Henry John Stephen Smith? G. Carey Foster? Alphonse Rebière? Anonymous? Question for Quote Investigator: In 1900 the influential German mathematician David Hilbert addressed the “International Congress of Mathematicians” held in Paris. He presented a collection of unsolved problems which has had …