Problem: Botany:

Botany was greatly stimulated by the appearance of the first "modern" text book, Matthias Schleiden's Grundzuge der Wissenschaftlichen Botanik, published in English in 1849 as Principles of Scientific Botany. Schleiden was a microscopist and an early plant anatomist who co-founded the cell theory with Theodor Schwann and Rudolf Virchow and was among the first to grasp the significance of the cell nucleus that had been described by Robert Brown in 1831. In 1855, Adolf Fick formulated Fick's laws that enabled the calculation of the rates of molecular diffusion in biological systems.

What theory did Schleiden co-found?
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A: cell theory

Problem: 51st state:

Puerto Rico has been under U.S. sovereignty for over a century when it was ceded to the U.S. by Spain following the end of the SpanishAmerican War, and Puerto Ricans have been U.S. citizens since 1917. The island's ultimate status has not been determined as of 2012[update], its residents do not have voting representation in their federal government. Puerto Rico has limited representation in the U.S. Congress in the form of a Resident Commissioner, a delegate with limited no voting rights. Like the states, Puerto Rico has self-rule, a republican form of government organized pursuant to a constitution adopted by its people, and a bill of rights.

How long have Puerto Ricans been U.S. citizens?
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A: since 1917

Problem: Cork (city):

The most notable cricket club in Cork is Cork County Cricket Club, which was formed in 1874. Although located within the Munster jurisdiction, the club plays in the Leinster Senior League. The club plays at the Mardyke, a ground which has hosted three first-class matches in 1947, 1961 and 1973. All three involved Ireland playing Scotland. The Cork Cricket Academy operates within the city, with the stated aim of introducing the sport to schools in the city and county. Cork's other main cricket club, Harlequins Cricket Club, play close to Cork Airport.

What Cricket club was formed in the 18th century?
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A: unanswerable

Problem: Gregorian calendar:

Lilius's proposals had two components. Firstly, he proposed a correction to the length of the year. The mean tropical year is 365.24219 days long. As the average length of a Julian year is 365.25 days, the Julian year is almost 11 minutes longer than the mean tropical year. The discrepancy results in a drift of about three days every 400 years. Lilius's proposal resulted in an average year of 365.2425 days (see Accuracy). At the time of Gregory's reform there had already been a drift of 10 days since the Council of Nicaea, resulting in the vernal equinox falling on 10 or 11 March instead of the ecclesiastically fixed date of 21 March, and if unreformed it would drift further. Lilius proposed that the 10-day drift should be corrected by deleting the Julian leap day on each of its ten occurrences over a period of forty years, thereby providing for a gradual return of the equinox to 21 March.

How much difference does the extra 11 minutes make over 400 years time?
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A:
three days