Problem: Two airports serve Philadelphia: the Philadelphia International Airport (PHL), straddling the southern boundary of the city, and the Northeast Philadelphia Airport (PNE), a general aviation reliever airport in Northeast Philadelphia. Philadelphia International Airport provides scheduled domestic and international air service, while Northeast Philadelphia Airport serves general and corporate aviation. In 2013, Philadelphia International Airport was the 15th busiest airport in the world measured by traffic movements (i.e. takeoffs and landings). It is also the second largest hub and primary international hub for American Airlines.
Where does PHL rank in the list of busiest airports?
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Answer: 15th

Problem: CDs are susceptible to damage during handling and from environmental exposure. Pits are much closer to the label side of a disc, enabling defects and contaminants on the clear side to be out of focus during playback. Consequently, CDs are more likely to suffer damage on the label side of the disc. Scratches on the clear side can be repaired by refilling them with similar refractive plastic or by careful polishing. The edges of CDs are sometimes incompletely sealed, allowing gases and liquids to corrode the metal reflective layer and to interfere with the focus of the laser on the pits. The fungus Geotrichum candidum, found in Belize, has been found to consume the polycarbonate plastic and aluminium found in CDs.
What causes edges of CDs to be incorrectly sealed?
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Answer: unanswerable

Problem: IBM's employee management practices can be traced back to its roots. In 1914, CEO Thomas J. Watson boosted company spirit by creating employee sports teams, hosting family outings, and furnishing a company band. IBM sports teams still continue in the present day; the IBM Big Blue continue to exist as semi-professional company rugby and American football teams. In 1924 the Quarter Century Club, which recognizes employees with 25 years of service, was organized and the first issue of Business Machines, IBM's internal publication, was published. In 1925, the first meeting of the Hundred Percent Club, composed of IBM salesmen who meet their quotas, convened in Atlantic City, New Jersey.
In 1925 the first meeting of this group occurred.
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Answer:
Hundred Percent Club