This task involves creating questions from a given passage that involve some kind of complex reasoning (including numerical reasoning). 
The generated questions must require looking at more than one part of the passage to answer. Try to use a variety of reasoning types in your questions (some of the sample reasoning types are illustrated in the 'positive examples' field) and also have a variety of answer types (spans, numbers, dates). A span is a continuous phrase taken directly from the passage or question. In such questions, the answer spans are recommended to be five words. Questions with answer type "number", are expected to start with "How many". For instance, "How long did an event last?" can be phrased as "How many years did an event last?". To increase diversity, try to create more questions for which the answer will be multiple spans. Please create questions that require AT LEAST 2 arithmetic operations as illustrated in the 'positive examples' field. You are encouraged to try DIFFERENT COMBINATIONS of operations and not just limit to the combinations shown in those examples. The more challenging questions you create, the better it is.

[Q]: Passage: A 2013 analysis of the National Assessment of Educational Progress found that from 1971 to 2008, the size of the black-white IQ gap in the United States decreased from 16.33 to 9.94 IQ points. It has also concluded however that, while IQ means are continuing to rise in all ethnic groups, this growth is occurring more slowly among 17-year-old students than among younger students and the black-white IQ gap is no longer narrowing. As of 2008, a study published in 2013 by Heiner Rindermann, Stefan Pinchelmann, and James Thompson have estimated the IQ means of 17-year-old black, white, and Hispanic students to range respectively from 90.45-94.15, 102.29-104.57 and 92.30-95.90 points. They explain that the gap may persist due to the crack epidemic, the degradation of African-American family structure, the rise of fraud in the educational system (especially with respect to No Child Left Behind), the decrease in unskilled real wages and employment among African-Americans due to globalization and minimum wage increases, differences in parental practices (such as breastfeeding or reading to children), and "environmental conditions shaped by [African-Americans] themselves." To resolve this, they ultimately recommend the reestablishment of "meritoric principles" and "blindly graded objective central exams," as opposed to "affirmative action," in education.
[A]: How many IQ points did the black-white IQ gap decrease between 1971 and 2008?


[Q]: Passage: AH-1 Cobras were in use by the Army during the Tet offensive in 1968 and through to the end of the Vietnam War. Cobras provided fire support for ground forces, escorted transport helicopters and other roles, including aerial rocket artillery (ARA) battalions in the two Airmobile divisions. They also formed "hunter killer" teams by pairing with OH-6 Cayuse scout helicopters. A team featured one OH-6 flying slow and low to find enemy forces. If the OH-6 drew fire, the Cobra could strike at the then revealed enemy. On 12 September 1968, Capt. Ronald Fogleman was flying an F-100 Super Sabre when the aircraft was shot down and he ejected 200 miles north of Bien Hoa.  Fogleman became the only pilot to be rescued by holding on to an Army AH-1Gs deployed gun-panel door. Bell built 1,116 AH-1Gs for the U.S. Army between 1967 and 1973, and the Cobras chalked up over a million operational hours in Vietnam; the number of Cobras in service peaked at 1,081. Out of nearly 1,110 AH-1s delivered from 1967 to 1973 approximately 300 were lost to combat and accidents during the war.  The U.S. Marine Corps used AH-1G Cobras in Vietnam for a short time before acquiring twin-engine Bell AH-1 SuperCobra.
[A]: Approximately how many of the 1110 AH-1s delivered from 1967 to 1973 were lost per year on average?


[Q]: Passage: The 1991 Washington Redskins season started with a franchise-record 11 straight victories. Also during the season, "The Hogs (American football)", under the coaching of Redskins offensive line coach Joe Bugel, allowed a league low and franchise record nine sacks – the third lowest total in NFL history. The 1991 Redskins offense also dominated under the brilliant coaching of offensive minded head football coach Joe Gibbs scoring 485 points which was the most by any team in the 1991 NFL season. The 1991 Redskins defense was also dominant under the coaching of defensive coordinator and guru Richie Petitbon, giving up only 224 total points which was second best of any team in the NFL in 1991, while also not allowing a single point to opponents in 3 of the 16 games played that season. After posting a 14–2 record, the Redskins made and dominated the 1991–92 NFL playoffs, beating the 1991 Atlanta Falcons season and 1991 Detroit Lions season by a combined score of 64–17.  On January 26, 1992, the Redskins won Super Bowl XXVI by defeating the Buffalo Bills 37–24 with Mark Rypien winning the games Super Bowl MVP award. After the Super Bowl, the Redskins set another franchise record by sending eight players to the Pro Bowl. The 1991 Washington Redskins season are widely considered one of the best teams in NFL history.
[A]:
How many NFL teams gave up fewer total points in the 1991 season than the Redskins?