BRAIN TEASERS

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Which is a winning combination of digits?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.

Correct answers: 47

The first user who solved this task is On On Lunarbasil.

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Carl Remigius Fresenius

Born 28 Dec 1818; died 11 Jun 1897 at age 78. German analytical chemist who devised a method for systematic identification and separation of individual metal and non-metal ions, selecting the most suitable reactions from the many that were known. The book he wrote expounding this system (Anleitung zur qualitativen chemischen Analyse, 1941) enjoyed great success. As it was the first to address this need, it became an enduring textbook. He followed this with a book on quantitative analysis (1846). Aged only 29, he founded the first chemical analysis and teaching laboratory, the Fresnius Training and Research Institute, in Wiesbaden, Germany. He founded the Zeitschrift für Analytische Chemie (Journal of Analytical Chemistry, 1862) which he edited until his death.«

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