Problem: Daylight saving time:

Changes to DST rules cause problems in existing computer installations. For example, the 2007 change to DST rules in North America required many computer systems to be upgraded, with the greatest impact on email and calendaring programs; the upgrades consumed a significant effort by corporate information technologists.

What can cause issues with installed computer systems?
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A: Changes to DST rules

Problem: Gamal Abdel Nasser:

Nasser played a significant part in the strengthening of African solidarity in the late 1950s and early 1960s, although his continental leadership role had increasingly passed to Algeria since 1962. During this period, Nasser made Egypt a refuge for anti-colonial leaders from several African countries and allowed the broadcast of anti-colonial propaganda from Cairo. Beginning in 1958, Nasser had a key role in the discussions among African leaders that led to the establishment of the Organisation of African Unity (OAU) in 1963.

What African group did Nasser help to form?
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A: Organisation of African Unity

Problem: The Blitz:

Probably the most devastating strike occurred on the evening of 29 December, when German aircraft attacked the City of London itself with incendiary and high explosive bombs, causing a firestorm that has been called the Second Great Fire of London. The first group to use these incendiaries was Kampfgruppe 100 which despatched 10 "pathfinder" He 111s. At 18:17, it released the first of 10,000 fire bombs, eventually amounting to 300 dropped per minute. Altogether, 130 German bombers destroyed the historical centre of London. Civilian casualties on London throughout the Blitz amounted to 28,556 killed, and 25,578 wounded. The Luftwaffe had dropped 18,291 short tons (16,593 t) of bombs.

How many fire bombs were dropped per minute?
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A: 300

Problem: Westminster Abbey:

The Pyx Chamber formed the undercroft of the monks' dormitory. It dates to the late 11th century and was used as a monastic and royal treasury. The outer walls and circular piers are of 11th-century date, several of the capitals were enriched in the 12th century and the stone altar added in the 13th century. The term pyx refers to the boxwood chest in which coins were held and presented to a jury during the Trial of the Pyx, in which newly minted coins were presented to ensure they conformed to the required standards.

When were oldly minted coins presented to ensure they met standards?
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A:
unanswerable