Problem: Portugal:

Portugal is defined as a Mediterranean climate (Csa in the South, interior, and Douro region; Csb in the North, Central Portugal and coastal Alentejo; mixed oceanic climate along the northern half of the coastline and also Semi-arid climate or Steppe climate (BSk in certain parts of Beja district far South) according to the Koppen-Geiger Climate Classification), and is one of the warmest European countries: the annual average temperature in mainland Portugal varies from 812 C (46.453.6 F) in the mountainous interior north to 1619 C (60.866.2 F) in the south and on the Guadiana river basin. The Algarve, separated from the Alentejo region by mountains reaching up to 900 metres (3,000 ft) in Alto de Foia, has a climate similar to that of the southern coastal areas of Spain or Southwest Australia.

In the south of Portugal and on the Guadiana river basin, between what degrees does the average temperature fluctuate?
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A: 1619 C (60.866.2 F)

Problem: Nintendo Entertainment System:

The Nintendo Entertainment System (also abbreviated as NES) is an 8-bit home video game console that was developed and manufactured by Nintendo. It was initially released in Japan as the Family Computer (Japanese: , Hepburn: Famiri Konpyuta?) (also known by the portmanteau abbreviation Famicom (, Famikon?) and abbreviated as FC) on July 15, 1983, and was later released in North America during 1985, in Europe during 1986, and Australia in 1987. In South Korea, it was known as the Hyundai Comboy ( Hyeondae Keomboi) and was distributed by SK Hynix which then was known as Hyundai Electronics. It was succeeded by the Super Nintendo Entertainment System.

what was it called in Japan?
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A: Family Computer

Problem: Modern history:

Many major events caused Europe to change around the start of the 16th century, starting with the Fall of Constantinople in 1453, the fall of Muslim Spain and the discovery of the Americas in 1492, and Martin Luther's Protestant Reformation in 1517. In England the modern period is often dated to the start of the Tudor period with the victory of Henry VII over Richard III at the Battle of Bosworth in 1485. Early modern European history is usually seen to span from the start of the 15th century, through the Age of Reason and the Age of Enlightenment in the 17th and 18th centuries, until the beginning of the Industrial Revolution in the late 18th century.

Who was defeated by Henry Vll at the battle of Bosworth?
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A: Richard III

Problem: Jews:

According to a report published in 2014, about 43% of all Jews reside in Israel (6.1 million), and 40% in the United States (5.7 million), with most of the remainder living in Europe (1.4 million) and Canada (0.4 million). These numbers include all those who self-identified as Jews in a socio-demographic study or were identified as such by a respondent in the same household. The exact world Jewish population, however, is difficult to measure. In addition to issues with census methodology, disputes among proponents of halakhic, secular, political, and ancestral identification factors regarding who is a Jew may affect the figure considerably depending on the source.

What is one reason the world population of Jews difficult to determine?
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A:
issues with census methodology