The problem: Answer a question about this article:
Development of a solar-powered car has been an engineering goal since the 1980s. The World Solar Challenge is a biannual solar-powered car race, where teams from universities and enterprises compete over 3,021 kilometres (1,877 mi) across central Australia from Darwin to Adelaide. In 1987, when it was founded, the winner's average speed was 67 kilometres per hour (42 mph) and by 2007 the winner's average speed had improved to 90.87 kilometres per hour (56.46 mph). The North American Solar Challenge and the planned South African Solar Challenge are comparable competitions that reflect an international interest in the engineering and development of solar powered vehicles.
What was the average speed of a winning solar powered car by 2007?
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The answer: 90.87 kilometres per hour (56.46 mph)

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The Demilitarized Zone runs northeast of the 38th parallel; to the south, it travels west. The old Korean capital city of Kaesong, site of the armistice negotiations, originally was in pre-war South Korea, but now is part of North Korea. The United Nations Command, supported by the United States, the North Korean People's Army, and the Chinese People's Volunteers, signed the Armistice Agreement on 27 July 1953 to end the fighting. The Armistice also called upon the governments of South Korea, North Korea, China and the United States to participate in continued peace talks. The war is considered to have ended at this point, even though there was no peace treaty. North Korea nevertheless claims that it won the Korean War.
What area is directly north and south of the 38th parallel?
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The answer: The Demilitarized Zone

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Northwestern has several housing options, including both traditional residence halls and residential colleges which gather together students who have a particular intellectual interest in common. Among the residential colleges are the Residential College of Cultural and Community Studies (CCS), Ayers College of Commerce and Industry, Jones Residential College (Arts), and Slivka Residential College (Science and Engineering). Dorms include 1835 Hinman, Bobb-McCulloch, Foster-Walker complex (commonly referred to as Plex), and several more. In Winter 2013, 39% of undergraduates were affiliated with a fraternity or sorority. Northwestern recognizes 21 fraternities and 18 sororities.
What percentage of undergraduates were affiliated with a fraternity or sorority in Winter 2013?
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The answer: 39%

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In 2001, Lee was inducted into the Alabama Academy of Honor. In the same year, Chicago mayor Richard M. Daley initiated a reading program throughout the city's libraries, and chose his favorite book, To Kill a Mockingbird, as the first title of the One City, One Book program. Lee declared that "there is no greater honor the novel could receive". By 2004, the novel had been chosen by 25 communities for variations of the citywide reading program, more than any other novel. David Kipen of the National Endowment of the Arts, who supervised The Big Read, states "people just seem to connect with it. It dredges up things in their own lives, their interactions across racial lines, legal encounters, and childhood. It's just this skeleton key to so many different parts of people's lives, and they cherish it."
In 2004, the novel as been picked by how many communities for citywide reading programs more than any other book?
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The answer:
25