Problem: Slavs:

Around the 6th century, Slavs appeared on Byzantine borders in great numbers.[page needed] The Byzantine records note that grass would not regrow in places where the Slavs had marched through, so great were their numbers. After a military movement even the Peloponnese and Asia Minor were reported to have Slavic settlements. This southern movement has traditionally been seen as an invasive expansion. By the end of the 6th century, Slavs had settled the Eastern Alps regions.

When had the Slavs settled the Eastern Alps?
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A: By the end of the 6th century

Problem: Samoa:

Director Sima Urale is an award-winning filmmaker. Urale's short film O Tamaiti won the prestigious Best Short Film at the Venice Film Festival in 1996. Her first feature film Apron Strings opened the 2008 NZ International Film Festival. The feature film Siones Wedding, co-written by Oscar Kightley, was financially successful following premieres in Auckland and Apia. The 2011 film The Orator was the first ever fully Samoan film, shot in Samoa in the Samoan language with a Samoan cast telling a uniquely Samoan story. Written and directed by Tusi Tamasese, it received much critical acclaim and attention at film festivals throughout the world.

In what year did Apron Strings star as the opening film of the NZ International Film Festival?
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A: 2008

Problem: Chicago Cubs:

In only his third career start, Kerry Wood struck out 20 batters against Houston on May 6, 1998. This is the franchise record and tied for the Major League record for the most strikeouts in one game by one pitcher (the only other pitcher to strike out 20 batters in a nine-inning game was Roger Clemens, who achieved it twice). The game is often considered the most dominant pitching performance of all time. Interestingly, Wood's first pitch struck home plate umpire Jerry Meals in the facemask. Wood then struck out the first five batters he faced. Wood hit one batter, Craig Biggio, and allowed one hit, a scratch single by Ricky Gutierrez off third baseman Kevin Orie's glove. The play was nearly scored an error, which would have given Wood a no-hitter.

When did Kerry Wood strike out 20 batters against Houston?
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A: May 6, 1998

Problem: Time:

The most accurate timekeeping devices are atomic clocks, which are accurate to seconds in many millions of years, and are used to calibrate other clocks and timekeeping instruments. Atomic clocks use the frequency of electronic transitions in certain atoms to measure the second. One of the most common atoms used is caesium, most modern atomic clocks probe caesium with microwaves to determine the frequency of these electron vibrations. Since 1967, the International System of Measurements bases its unit of time, the second, on the properties of caesium atoms. SI defines the second as 9,192,631,770 cycles of the radiation that corresponds to the transition between two electron spin energy levels of the ground state of the 133Cs atom.

What method do atomic clocks use to measure cycles?
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A:
unanswerable