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: Obesity is one of the leading preventable causes of death worldwide. A number of reviews have found that mortality risk is lowest at a BMI of 20–25 kg/m2 in non-smokers and at 24–27 kg/m2 in current smokers, with risk increasing along with changes in either direction. This appears to apply in at least four continents. In contrast, a 2013 review found that grade 1 obesity (BMI 30–35) was not associated with higher mortality than normal weight, and that overweight (BMI 25–30) was associated with "lower" mortality than was normal weight (BMI 18.5–25). Other evidence suggests that the association of BMI and waist circumference with mortality is U- or J-shaped, while the association between waist-to-hip ratio and waist-to-height ratio with mortality is more positive. In Asians the risk of negative health effects begins to increase between 22–25 kg/m2. A BMI above 32 kg/m2 has been associated with a doubled mortality rate among women over a 16-year period. Obesity in the United States, obesity is estimated to cause 111,909 to 365,000 deaths per year, while 1 million (7.7%) of deaths in Europe are attributed to excess weight.  On average, obesity reduces life expectancy by six to seven years, a BMI of 30–35 kg/m2 reduces life expectancy by two to four years, while severe obesity (BMI > 40 kg/m2) reduces life expectancy by ten years.
What BMI reduces life expectancy for ten years, BMI of 30–35 kg/m2 or BMI > 40 kg/m2?

Passage: In 1642, Güshi Khan, founder of the Khoshut Khanate, overthrew the prince of Tsang and made the 5th Dalai Lama the highest spiritual and political authority in Tibet, establishing the regime known as Ganden Phodrang. Tsewang Rabtan invaded Tibet in 1717, deposed the pretender to the position of Dalai Lama of Lha-bzang Khan, the last ruler of the Khoshut Khanate, and killed Lha-bzang Khan and his entire family. They also viciously destroyed a small force in the Battle of the Salween River which the Kangxi Emperor of the Qing dynasty had sent to clear traditional trade routes in 1718. In response, an expedition sent by Kangxi Emperor, together with Tibetan forces under Polhané Sönam Topgyé of Tsang and Kangchennas , the governor of Western Tibet, expelled the Dzungars from Tibet in 1720. This began the Qing rule of Tibet, which lasted until the fall of the Qing dynasty in 1912.
How many years after Tsewang Rabtan invaded Tibet did the Battle of the Salween River take place?

Passage: Hyder Ali asked the rulers of Cochin and of Travancore to pay tribute as vassal states. Cochin was asked to pay a total of Rs. 400,000 and ten elephants, while Travancore was asked to pay Rs. 1,500,000 and thirty elephants. The Cochin royals agreed to pay the amount and accepted the Mysore's superiority. Finally, Malabar and Cochin came under the Mysore rule, opening Malabar Coast to the kings of Mysore.  However the King of Travancore, who was under the protection of the East India Company, refused to pay the tribute. Eventually the Mysore army began to move to Travancore from the north. The Dutch military garrison at Cranganore Fort tried to stall the movement. Hyder Ali asked his commander Sardar Khan to take an army of 10,000 along the Cochin Kingdom. In August 1776, Cochin was invaded from the north and the fort at Trichur was captured. After the surrender of the ruler of Cochin, Hyder advanced to the Travancore Defence Lines . By this time Airoor and Chetuva Fort were ceded to Mysore. Meanwhile, the Dutch, with the help of the Travancore Nair Army, put down an attempt by the Mysore forces to capture the Cranganore Fort. The ruler of Cranganore, however surrendered to Hyder Ali, though the Dutch stormed his palace and captured it in January 1778.

How many Rs and elephants was Cochin asked to pay?