Problem: Sumer:

The Sumerians developed a complex system of metrology c. 4000 BC. This advanced metrology resulted in the creation of arithmetic, geometry, and algebra. From c. 2600 BC onwards, the Sumerians wrote multiplication tables on clay tablets and dealt with geometrical exercises and division problems. The earliest traces of the Babylonian numerals also date back to this period. The period c. 2700 2300 BC saw the first appearance of the abacus, and a table of successive columns which delimited the successive orders of magnitude of their sexagesimal number system. The Sumerians were the first to use a place value numeral system. There is also anecdotal evidence the Sumerians may have used a type of slide rule in astronomical calculations. They were the first to find the area of a triangle and the volume of a cube.

Who invented the slide ruler?
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A: unanswerable

Problem: Antenna (radio):

The polarization of an antenna refers to the orientation of the electric field (E-plane) of the radio wave with respect to the Earth's surface and is determined by the physical structure of the antenna and by its orientation; note that this designation is totally distinct from the antenna's directionality. Thus, a simple straight wire antenna will have one polarization when mounted vertically, and a different polarization when mounted horizontally. As a transverse wave, the magnetic field of a radio wave is at right angles to that of the electric field, but by convention, talk of an antenna's "polarization" is understood to refer to the direction of the electric field.

What is another name for electric-field?
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A: E-plane

Problem: Israel:

With successive Persian rule, the region, divided between Syria-Coele province and later the autonomous Yehud Medinata, was gradually developing back into urban society, largely dominated by Judeans. The Greek conquests largely skipped the region without any resistance or interest. Incorporated into Ptolemaic and finally Seleucid Empires, the southern Levant was heavily hellenized, building the tensions between Judeans and Greeks. The conflict erupted in 167 BCE with the Maccabean Revolt, which succeeded in establishing an independent Hasmonean Kingdom in Judah, which later expanded over much of modern Israel, as the Seleucids gradually lost control in the region.

Who dominated the society?
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A: Judeans

Problem: Ann Arbor, Michigan:

Since the university's establishment in the city in 1837, the histories of the University of Michigan and Ann Arbor have been closely linked. The town became a regional transportation hub in 1839 with the arrival of the Michigan Central Railroad, and a northsouth railway connecting Ann Arbor to Toledo and other markets to the south was established in 1878. Throughout the 1840s and the 1850s settlers continued to come to Ann Arbor. While the earlier settlers were primarily of British ancestry, the newer settlers also consisted of Germans, Irish, and African-Americans. In 1851, Ann Arbor was chartered as a city, though the city showed a drop in population during the Depression of 1873. It was not until the early 1880s that Ann Arbor again saw robust growth, with new immigrants coming from Greece, Italy, Russia, and Poland. Ann Arbor saw increased growth in manufacturing, particularly in milling. Ann Arbor's Jewish community also grew after the turn of the 20th century, and its first and oldest synagogue, Beth Israel Congregation, was established in 1916.

Which town became the regional transport hub in 1878?
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A:
Ann Arbor