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: 28

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

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Baseball is a team effort

Baseball is a team effort. Especially the bullpen. Everyone has to pitch inning.

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File factory

In 1864, a U.S. patent for a machine for cutting files was issued to William Nicholson of Providence, R.I. (No. 42,216). This machine was put to use in the first successful U.S. file factory, the Nicholson File Company (1864). Prior to the Civil War, Nicholson had a machine tool business, at which time he developed his ideas on machine file making and built his first file cutting machine. He went to Europe, which at that time supplied most of the files used in America, and studied this industries, including the manufacture and treatment of steel. He opened his plant with the hope of developing to a production of 300 dozen files per day. The goal was not easily met, until he proved the quality of his files matched those made by hand.

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