The problem: Answer a question about this article:
Brass, which is an alloy of copper and zinc, has been used since at least the 10th century BC in Judea and by the 7th century BC in Ancient Greece. Zinc metal was not produced on a large scale until the 12th century in India and was unknown to Europe until the end of the 16th century. The mines of Rajasthan have given definite evidence of zinc production going back to the 6th century BC. To date, the oldest evidence of pure zinc comes from Zawar, in Rajasthan, as early as the 9th century AD when a distillation process was employed to make pure zinc. Alchemists burned zinc in air to form what they called "philosopher's wool" or "white snow".
We have evidence of zinc production dating back to the 6th century thanks to what mine?
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The answer: Rajasthan

The problem: Answer a question about this article:
The total length of roads in Nepal is recorded to be (17,182 km (10,676 mi)), as of 200304. This fairly large network has helped the economic development of the country, particularly in the fields of agriculture, horticulture, vegetable farming, industry and also tourism. In view of the hilly terrain, transportation takes place in Kathmandu are mainly by road and air. Kathmandu is connected by the Tribhuvan Highway to the south, Prithvi Highway to the west and Araniko Highway to the north. The BP Highway, connecting Kathmandu to the eastern part of Nepal is under construction.
Why is travel in Kathmandu mainly via automobile or aircraft?
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The answer: hilly terrain

The problem: Answer a question about this article:
Large brushes are desired for a larger brush contact area to maximize motor output, but small brushes are desired for low mass to maximize the speed at which the motor can run without the brushes excessively bouncing and sparking. (Small brushes are also desirable for lower cost.) Stiffer brush springs can also be used to make brushes of a given mass work at a higher speed, but at the cost of greater friction losses (lower efficiency) and accelerated brush and commutator wear. Therefore, DC motor brush design entails a trade-off between output power, speed, and efficiency/wear.
Whate are small brushes favorable for?
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The answer: speed

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Hitler's interest in this strategy forced Goring and Jeschonnek to review the air war against Britain in January 1941. This led to Goring and Jeschonnek agreeing to Hitler's Directive 23, Directions for operations against the British War Economy, which was published on 6 February 1941 and gave aerial interdiction of British imports by sea top priority. This strategy had been recognised before the war, but Operation Eagle Attack and the following Battle of Britain had got in the way of striking at Britain's sea communications and diverted German air strength to the campaign against the RAF and its supporting structures. The OKL had always regarded the interdiction of sea communications of less importance than bombing land-based aircraft industries.
What was a top priority of Directive 23?
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The answer:
aerial interdiction of British imports by sea