Problem: Which German engineer gives his name to the four-stroke cycle of a petrol engine?
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A: nikolaus otto

Problem: Which saint, whose feast day is on October 25th., was made even more famous in a speech by Shakespeare's king 'Henry V'?
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A: st crispin

Problem: Which Scottish castle did Queen Victoria and husband Prince Albert buy in 1852?
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A: balmoral

Problem: In the Harry Potter series of books which animal is Hagrid allergic to?
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A:
cats