BRAIN TEASERS

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Find the right combination

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: 20

The first user who solved this task is Nasrin 24 T.

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Wanna Dance?

A rather awkward freshman finally got up the nerve to ask a pretty junior for a dance at the homecoming. She gave him the once-over and said, "Sorry, I won't dance with a child."
"Oh I'm sorry," responded the underclassman, "I didn't realize you were pregnant."

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Samuel Abraham Goudsmit

Born 11 Jul 1902; died 4 Dec 1978 at age 76.Dutch-born U.S. physicist who, with George E. Uhlenbeck, a fellow graduate student at the University of Leiden, Neth., formulated (1925) the concept of electron spin. It led to recognition that spin was a property of protons, neutrons, and most elementary particles and to a fundamental change in the mathematical structure of quantum mechanics. Goudsmit also made the first measurement of nuclear spin and its Zeeman effect with Ernst Back (1926-27), developed a theory of hyperfine structure of spectral lines, made the first spectroscopic determination of nuclear magnetic moments (1931-33), contributed to the theory of complex atoms and the theory of multiple scattering of electrons, and invented the magnetic time-of-flight mass spectrometer (1948).

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