Problem: Affirmative action in the United States:

In 2006, Jian Li, a Chinese undergraduate at Yale University, filed a civil rights complaint with the Office for Civil Rights against Princeton University, claiming that his race played a role in their decision to reject his application for admission and seeking the suspension of federal financial assistance to the university until it "discontinues discrimination against Asian Americans in all forms" by eliminating race and legacy preferences. Princeton Dean of Admissions Janet Rapelye responded to the claims in the November 30, 2006, issue of the Daily Princetonian by stating that "the numbers don't indicate [discrimination]." She said that Li was not admitted because "many others had far better qualifications." Li's extracurricular activities were described as "not all that outstanding". Li countered in an email, saying that his placement on the waitlist undermines Rapelye's claim. "Princeton had initially waitlisted my application," Li said. "So if it were not for a yield which was higher than expected, the admissions office very well may have admitted a candidate whose "outside activities were not all that outstanding".

What did Princeton claim the real reasons for the approval of Li's application was?
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A: unanswerable

Problem: History of India:

Muslim rule started in parts of north India in the 13th century when the Delhi Sultanate was founded in 1206 CE by the Central Asian Turks. The Delhi Sultanate ruled the major part of northern India in the early 14th century, but declined in the late 14th century when several powerful Hindu states such as the Vijayanagara Empire, Gajapati Kingdom, Ahom Kingdom, as well as Rajput dynasties and states, such as Mewar dynasty, emerged. The 15th century saw the emergence of Sikhism. In the 16th century, Mughals came from Central Asia and gradually covered most of India. The Mughal Empire suffered a gradual decline in the early 18th century, which provided opportunities for the Maratha Empire, Sikh Empire and Mysore Kingdom to exercise control over large areas of the subcontinent.

When did the Delhi Sultanate decline in its rule of northern India?
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A: late 14th century

Problem: Annelid:

The brain generally forms a ring round the pharynx (throat), consisting of a pair of ganglia (local control centers) above and in front of the pharynx, linked by nerve cords either side of the pharynx to another pair of ganglia just below and behind it. The brains of polychaetes are generally in the prostomium, while those of clitellates are in the peristomium or sometimes the first segment behind the peristomium. In some very mobile and active polychaetes the brain is enlarged and more complex, with visible hindbrain, midbrain and forebrain sections. The rest of the central nervous system is generally "ladder-like", consisting of a pair of nerve cords that run through the bottom part of the body and have in each segment paired ganglia linked by a transverse connection. From each segmental ganglion a branching system of local nerves runs into the body wall and then encircles the body. However, in most polychaetes the two main nerve cords are fused, and in the tube-dwelling genus Owenia the single nerve chord has no ganglia and is located in the epidermis.

What is rarely "ladder-like"?
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A: unanswerable

Problem: Anti-aircraft warfare:

The US ended World War I with two 3-inch AA guns and improvements were developed throughout the inter-war period. However, in 1924 work started on a new 105 mm static mounting AA gun, but only a few were produced by the mid-1930s because by this time work had started on the 90 mm AA gun, with mobile carriages and static mountings able to engage air, sea and ground targets. The M1 version was approved in 1940. During the 1920s there was some work on a 4.7-inch which lapsed, but revived in 1937, leading to a new gun in 1944.

Only a few of the 105 mm static mounting AA guns were produced because work had started on which other gun?
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A:
90 mm AA gun