The problem: Answer a question about this article:
A healthy, and legal, publishing industry existed throughout Europe, although established publishers and book sellers occasionally ran afoul of the law. The Encyclopedie, for example, condemned not only by the King but also by Clement XII, nevertheless found its way into print with the help of the aforementioned Malesherbes and creative use of French censorship law. But many works were sold without running into any legal trouble at all. Borrowing records from libraries in England, Germany and North America indicate that more than 70 percent of books borrowed were novels. Less than 1 percent of the books were of a religious nature, indicating the general trend of declining religiosity.
What percentage of books borrowed were of a religious nature in England, Germany, and North America?
****
The answer: 1

The problem: Answer a question about this article:
The interactions of carbonate anions with uranium(VI) cause the Pourbaix diagram to change greatly when the medium is changed from water to a carbonate containing solution. While the vast majority of carbonates are insoluble in water (students are often taught that all carbonates other than those of alkali metals are insoluble in water), uranium carbonates are often soluble in water. This is because a U(VI) cation is able to bind two terminal oxides and three or more carbonates to form anionic complexes.
What does a uranium(VI) cation form when it binds to two terminal oxides and three or more carbonates?
****
The answer: anionic complexes

The problem: Answer a question about this article:
Universal Studios was founded by Carl Laemmle, Mark Dintenfass, Charles O. Baumann, Adam Kessel, Pat Powers, William Swanson, David Horsley, Robert H. Cochrane[a] and Jules Brulatour. One story has Laemmle watching a box office for hours, counting patrons and calculating the day's takings. Within weeks of his Chicago trip, Laemmle gave up dry goods to buy the first several nickelodeons. For Laemmle and other such entrepreneurs, the creation in 1908 of the Edison-backed Motion Picture Trust meant that exhibitors were expected to pay fees for Trust-produced films they showed. Based on the Latham Loop used in cameras and projectors, along with other patents, the Trust collected fees on all aspects of movie production and exhibition, and attempted to enforce a monopoly on distribution.
After a trip to what city did Carl Laemmle leave the dry goods business?
****
The answer: Chicago

The problem: Answer a question about this article:
Bohr also introduced the quantity , now known as the reduced Planck constant, as the quantum of angular momentum. At first, Bohr thought that this was the angular momentum of each electron in an atom: this proved incorrect and, despite developments by Sommerfeld and others, an accurate description of the electron angular momentum proved beyond the Bohr model. The correct quantization rules for electrons in which the energy reduces to the Bohr model equation in the case of the hydrogen atom were given by Heisenberg's matrix mechanics in 1925 and the Schrodinger wave equation in 1926: the reduced Planck constant remains the fundamental quantum of angular momentum. In modern terms, if J is the total angular momentum of a system with rotational invariance, and Jz the angular momentum measured along any given direction, these quantities can only take on the values
Bohr introduced what value as the quantum of angular momentum?
****
The answer:
the reduced Planck constant