Problem: BeiDou Navigation Satellite System:

Compass-M1 transmits in 3 bands: E2, E5B, and E6. In each frequency band two coherent sub-signals have been detected with a phase shift of 90 degrees (in quadrature). These signal components are further referred to as "I" and "Q". The "I" components have shorter codes and are likely to be intended for the open service. The "Q" components have much longer codes, are more interference resistive, and are probably intended for the restricted service. IQ modulation has been the method in both wired and wireless digital modulation since morsetting carrier signal 100 years ago.

What is the intended purpose of the "Q" component?
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A: probably intended for the restricted service

Problem: Estonia:

As a member of the European Union, Estonia is considered a high-income economy by the World Bank. The GDP (PPP) per capita of the country, a good indicator of wealth, was in 2015 $28,781 according to the IMF, between that of Slovak Republic and Lithuania, but below that of other long-time EU members such as Italy or Spain. The country is ranked 8th in the 2015 Index of Economic Freedom, and the 4th freest economy in Europe. Because of its rapid growth, Estonia has often been described as a Baltic Tiger beside Lithuania and Latvia. Beginning 1 January 2011, Estonia adopted the euro and became the 17th eurozone member state.

Where is Estonia ranked in the 2015 Index of Economic Freedom?
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A: 8th

Problem: Madrasa:

However, all of these facets of medieval university life are considered by standard scholarship to be independent medieval European developments with no tracable Islamic influence. Generally, some reviewers have pointed out the strong inclination of Makdisi of overstating his case by simply resting on "the accumulation of close parallels", but all the while failing to point to convincing channels of transmission between the Muslim and Christian world. Norman Daniel points out that the Arab equivalent of the Latin disputation, the taliqa, was reserved for the ruler's court, not the madrasa, and that the actual differences between Islamic fiqh and medieval European civil law were profound. The taliqa only reached Islamic Spain, the only likely point of transmission, after the establishment of the first medieval universities. In fact, there is no Latin translation of the taliqa and, most importantly, no evidence of Latin scholars ever showing awareness of Arab influence on the Latin method of disputation, something they would have certainly found noteworthy. Rather, it was the medieval reception of the Greek Organon which set the scholastic sic et non in motion. Daniel concludes that resemblances in method had more to with the two religions having "common problems: to reconcile the conflicting statements of their own authorities, and to safeguard the data of revelation from the impact of Greek philosophy"; thus Christian scholasticism and similar Arab concepts should be viewed in terms of a parallel occurrence, not of the transmission of ideas from one to the other, a view shared by Hugh Kennedy.

What do scholars believe is the reason for similarities between Islamic and European schools?
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A: parallel occurrence

Problem: Poultry:

Domestic geese are much larger than their wild counterparts and tend to have thick necks, an upright posture, and large bodies with broad rear ends. The greylag-derived birds are large and fleshy and used for meat, while the Chinese geese have smaller frames and are mainly used for egg production. The fine down of both is valued for use in pillows and padded garments. They forage on grass and weeds, supplementing this with small invertebrates, and one of the attractions of rearing geese is their ability to grow and thrive on a grass-based system. They are very gregarious and have good memories and can be allowed to roam widely in the knowledge that they will return home by dusk. The Chinese goose is more aggressive and noisy than other geese and can be used as a guard animal to warn of intruders. The flesh of meat geese is dark-coloured and high in protein, but they deposit fat subcutaneously, although this fat contains mostly monounsaturated fatty acids. The birds are killed either around 10 or about 24 weeks. Between these ages, problems with dressing the carcase occur because of the presence of developing pin feathers.

What types of geese are used for human consumption?
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A:
The greylag-derived birds