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What is the missing number?

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 45

The first user who solved this task is Thinh Ddh.

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Michael Ian Black: Ambien Racing Game

Heres how you play: on your drive home tonight... when you get, like, 15, 20 minutes away from your house, take an Ambien -- and then just try to beat it. Really fun, and it makes the last part of the drive go really fast, you guys.

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James Ferguson

Born 31 Aug 1797; died 26 Sep 1867 at age 70.Scottish-American astronomer who discovered the first previously unknown asteroid to be detected from North America. He recorded it on 1 Sep 1854 at the U.S. Naval Observatory, where he worked 1848-67. This was the thirty-first of the series and is now known as 31 Euphrosyne, named after one of the Charites in Greek mythology. It is one of the largest of the main belt asteroids, between Mars and Jupiter. He was involved in some of the earliest work in micrometry was done at the old U.S. Naval Observatory at Foggy Bottom in the midst of the Civil War using a 9.6 inch refractor. He also contributed to double star astronomy. Earlier in his life he was a civil engineer, member of the Northwest Boundary Survey, and an assistant in the U.S. Coast Survey.«(Note: Another astronomer and instrument maker by the same name of James Ferguson lived in Scotland 1710-1776.)

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