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Which number should replace the question mark?

Correct answers: 700

The first user who solved this task is BrainTeasers Mozgalice.

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Which one picked it up?

Just before Christmas, an honest politician, a generous lawyer and Santa Claus were riding in the elevator of a very posh hotel.

Just before the doors opened they all noticed a $20 bill lying on the floor. Which one picked it up?

Santa of course, because the other two don't exist!

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Charles Proteus Steinmetz

Born 9 Apr 1865; died 26 Oct 1923 at age 58. German-American electrical engineer and inventor whose theories and mathematical analysis of alternating current systems helped establish them as the preferred form of electrical energy in the United States, and throughout the world. In 1893, Steinmetz joined the newly organized General Electric Company where he was an engineer then consultant until his death. His early research on hysteresis (loss of power due to magnetic resistance) led him to study alternating current, which could eliminate hysteresis loss in motors. He did extensive new work on the theory of a.c. for electrical engineers to use. His last research was on lightning, and its threat to the new AC power lines. He was responsible for the expansion of the electric power industry in the U.S.

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