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: In the USA an estimate was found of 32,500 children (<21 years) that suffer from major paediatric amputation, with 5,525 new cases each year, of which 3,315 congenital. Carr et al. (1998) investigated amputations caused by landmines for Afghanistan, Bosnia and Herzegovina, Cambodia and Mozambique among children (<14 years), showing estimates of respectively 4.7, 0.19, 1.11 and 0.67 per 1000 children. Mohan (1986) indicated in India a total of 424,000 amputees (23,500 annually), of which 10.3% had an onset of disability below the age of 14, amounting to a total of about 43,700 limb deficient children in India alone.
How many amputees in India in all are not children?

Passage: The first clashes between the Armenians and Azeris took place in Baku in February 1905. Soon the conflict spilled over to other parts of the Caucasus, and on August 5, 1905, the first conflict between the Armenian and Azeri population of Shusha took place. In March 1918 ethnic and religious tensions grew and the Armenian-Azeri conflict in Baku began. Musavat and Committee of Union and Progress parties were accused of Pan-Turkism by Bolsheviks and their allies. Armenian and Muslim militias engaged in armed confrontations, which resulted in heavy casualties. Many Muslims were expelled from Baku or went underground. Meanwhile, the arrest of Gen. Talyshinski, the commander of the Azerbaijani division, and some of its officers—all of whom arrived in Baku on March 9—increased anti-Soviet feelings among the city's Azeri population. On 30 March the Soviets, based on the unfounded report that the Muslim crew of the ship Evelina was armed and ready to revolt against the Soviets, disarmed the crew which tried to resist. This led to three days fighting,resulting in the death of up to 12,000 Azeris.
How many Azeri lives were lost in the conflict?

Passage: Australian historian Peter Shergold confirms the findings of many scholars that the standard of living for US industrial workers was higher than in Europe.  He compares wages and the standard of living in Pittsburgh with Birmingham, England. He finds that, after taking into account the cost of living , the standard of living of unskilled workers was about the same in the two cities, while skilled workers had about twice as high a standard of living. The American advantage grew over time from 1890 to 1914, and there was a heavy steady flow of skilled workers from Britain to industrial America.  Shergold revealed that skilled Americans did earn higher wages than the British, yet unskilled workers did not, while Americans worked longer hours, with a greater chance of injury, and had fewer social services. Nationwide from 1890 to 1914 the unionized wages in manufacturing rose from $17.63 a week to $21.37, and the average work week fell from 54.4 to 48.8 hours a week. The pay for all factory workers was $11.94 and $15.84 because unions reached only the more skilled factory workers.

BY how many hours did the average work week for skilled workers decrease during the period from 1890 to 1914?