Problem: Human Development Index:

The formula defining the HDI is promulgated by the United Nations Development Programme (UNDP). In general, to transform a raw variable, say , into a unit-free index between 0 and 1 (which allows different indices to be added together), the following formula is used:

What entity makes the defining formula for the HDI well-known?
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A: the United Nations Development Programme

Problem: Among the results of the Greek and Islamic influence on this period in European history was the replacement of Roman numerals with the decimal positional number system and the invention of algebra, which allowed more advanced mathematics. Astronomy advanced following the translation of Ptolemy's Almagest from Greek into Latin in the late 12th century. Medicine was also studied, especially in southern Italy, where Islamic medicine influenced the school at Salerno.
Into what language was Almagest translated in the 12th century?
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Answer: Latin

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In the Alicante province Catalan is being replaced by Spanish, and in Alghero by Italian. There are also well ingrained diglossic attitudes against Catalan in the Valencian Community, Ibiza, and to a lesser extent, in the rest of the Balearic islands.
What are the anti-Catalan attitudes in Valencia and Ibiza?
A: ingrained diglossic attitudes

Context and question: According to Shia beliefs, those who are firmly rooted in knowledge like Muhammad and the imams know the secrets of the Quran. According to Tabatabaei, the statement "none knows its interpretation except God" remains valid, without any opposing or qualifying clause. Therefore, so far as this verse is concerned, the knowledge of the Quran's interpretation is reserved for God. But Tabatabaei uses other verses and concludes that those who are purified by God know the interpretation of the Quran to a certain extent.
According to Sunni Muslims, who is the only one who can fully know the a Quranic interpretation?
Answer: unanswerable

Question: The apartheid bureaucracy devised complex (and often arbitrary) criteria in the Population Registration Act of 1945 to determine who belonged in which group. Minor officials administered tests to enforce the classifications. When it was unclear from a person's physical appearance whether the individual should be considered Coloured or Black, the "pencil test" was used. A pencil was inserted into a person's hair to determine if the hair was kinky enough to hold the pencil, rather than having it pass through, as it would with smoother hair. If so, the person was classified as Black. Such classifications sometimes divided families.
Is there an answer to this question: What act determined what class a citizen belonged to?

Answer: the Population Registration Act of 1945

QUES: Airports may also contain premium and VIP services. The premium and VIP services may include express check-in and dedicated check-in counters. These services are usually reserved for First and Business class passengers, premium frequent flyers, and members of the airline's clubs. Premium services may sometimes be open to passengers who are members of a different airline's frequent flyer program. This can sometimes be part of a reciprocal deal, as when multiple airlines are part of the same alliance, or as a ploy to attract premium customers away from rival airlines.

These services are usually reserved for what class of passengers?
What is the answer?
ANS:
First and Business class