TASK DEFINITION: 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.
PROBLEM: Passage: Over the centuries, Weimar remained a small town of less than 5,000 inhabitants. When it became the capital of Saxe-Weimar in 1572, population growth was stimulated and population increased from 3,000 in 1650 to 6,000 in 1750. Around the year 1800, Weimar had 7,000 inhabitants. Their number grew constantly over the years to 13,000 in 1850, 28,000 in 1900 and 35,000 at the beginning of World War I. During the interwar period, the new capital of Thuringia saw a population boom, which led to 65,000 inhabitants in 1940. Since that time, the population levels have stagnated. The years 2009 to 2012 brought a moderate growth of approximately 0.35% p. a., whereas the population in bordering rural regions is shrinking with accelerating tendency. Suburbanization played only a small role in Weimar. It occurred after the reunification for a short time in the 1990s, but most of the suburban areas were situated within the administrative city borders.

SOLUTION: Between 1750 and 1900, how many residents did Weimar gain?

PROBLEM: Passage: Hoping to rebound from their road loss to the Steelers, the 49ers went home and played an NFC West battle with the Seattle Seahawks. In the first quarter, the Niners lost QB Alex Smith with a separated shoulder during a sack.  Back-up QB Trent Dilfer would take the position for the rest of the game. In the second quarter, San Francisco's recent woes continued with Seahawks kicker Josh Brown getting a 23-yard field goal. Afterwards, Seattle began to pound away with QB Matt Hasselbeck completing a 17-yard TD pass to WR Bobby Engram, along with Brown kicking a 31-yard field goal. In the third quarter, the Seahawks continued their domination as Hasselbeck completed a 14-yard TD pass to TE Marcus Pollard. The Niners would get their only score of the game as kicker Joe Nedney got a 43-yard field goal. In the fourth quarter, Seattle sealed San Francisco's doom with Brown nailing a 25-yard field goal.

SOLUTION: How many field goals between 20 and 30 yards were scored?

PROBLEM: Passage: Coming off their big home win over San Francisco, the Steelers traveled to St. Louis to take on the Rams in the Edward Jones Dome. After a long delay before the game due to the field catching fire from a pyrotechnical error during the Rams' entrance, the game got underway. Pittsburgh got on the board early with a Josh Scobee field goal, and held the Rams scoreless for the first quarter. Early in the second quarter, Rams' kicker Greg Zuerlein gave them a field goal, tying the game. But, the returning Le'Veon Bell scored on a one-yard run in the second quarter; Pittsburgh failed to convert on a two-point play, but lead 9-3. The score remained this way for most of the game, and neither team scored in the third quarter. Quarterback Ben Roethlisberger injured his left knee mid-third quarter; he was carted off-field and Michael Vick replaced him for the remainder of the game. Zuerlein added to the Rams' score with another field goal, inching the Rams closer 9-6. But, Scobee kicked another field goal for the Steelers, increasing their lead 12-6. St. Louis failed to convert late in the game, and Vick kneeled down to end the game. With their win and a Cleveland loss to Oakland, the Steelers improved to 2-1 and took sole possession of second in the AFC North.

SOLUTION:
What delayed the game?