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.

Passage: As of the census of 2010, there were 47,723 people, 17,816 households, and 11,722 families residing in the city. The population density was 1,754.6/sq mi (677.5/km²).  There were 19,806 housing units at an average density of 749.9 per square mile (289.6/km²).  The racial makeup of the city was 38.32% White (U.S. Census), 57.25% African American (U.S. Census), 1.25% Native American (U.S. Census), 1.85% Asian, 0.14% Pacific Islander (U.S. Census), 1.03% from Race (United States Census), and 1.09% from two or more races.  6.98% of the population were Hispanics in the United States or Latino (U.S. Census) of any race.
How many fewer households were there compared to housing units?

Passage: The first German battlecruiser——was commenced March 1908. Four Parsons turbines were used, improving speed to 27 knots and reducing weight. Four twin turrets mounted 28 cm guns; although the two centre turrets were still placed one either side of the ship, they were offset so could now fire either side. The design was considered a success, but the cost at 35.5 million marks was significantly above the 1906 allocation. Light cruiser development continued with the  light cruisers, which were to become famous for their actions in the start of World War I in the Pacific. The ships were 3,300 tons, and armed with ten 10.5 cm rapid fire guns and a speed around 24 knots.  cost 7.5 million marks, and  6 million marks. Four  were produced between 1907 and 1911 at 4,400 tons and around 8 million marks each. These had turbines, twelve 10.5 cm guns as main armament, but were also equipped to carry and lay 100 mines. From 1907 onward, all torpedo boats were constructed using turbine engines.
How many knots faster could the battlecruiser travel than the light cruisers?

Passage: Hoping to snap a five-game losing streak, the Broncos returned home for a game against the Houston Texans. In the first quarter, the Broncos trailed early, after a 3-yard touchdown run by Texans' running back Arian Foster, followed in the second quarter by a 3-yard touchdown pass from quarterback Matt Schaub to tight end Owen Daniels, and a 34-yard field goal by placekicker Neil Rackers, giving Houston a 17-0 halftime lead. The Broncos got on the board in the third quarter, with a 6-yard touchdown run by running back Correll Buckhalter, but the Texans responded, with a 54-yard field goal by Rackers. The Broncos cut into the Texans' lead, with a 27-yard field goal by placekicker Steven Hauschka, but a 57-yard field goal by Rackers gave Houston a 23-10 lead. In the fourth quarter, the Broncos staged a rally, with a 23-yard touchdown pass from quarterback Tim Tebow to Buckhalter, followed by Tebow scrambling for a 6-yard touchdown run, giving the Broncos a 24-23 lead with three minutes remaining. The Broncos' defense thwarted Houston's final drive.

How many points did the Broncos win by?