Problem: What was first seen at Lowell Observatory in 1930?
Answer: pluto

Problem: According to a study of international Wikipedia articles who did Massachusetts Institute of Technology judge the most famous person of all time (at 2014)?
Answer: aristotle

Problem: Which 'A' is a liqueur originally distilled from wine and wormwood?
Answer: absinthe

Problem: Which card game is also the name of a British racecourse and H.Q. of British horse racing
Answer:
newmarket