Problem: What are the chemically identical species of atom with the same atomic number but different mass numbers called?
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A: isotopes

Problem: Dave Gahan and Martin Gore are members of which British electronic band founded in the 1980s, they played the 02 Arena in 2013?
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A: depeche mode

Problem: What was the original prize for winning golf's Open Championship (the British Open)?
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A: belt

Problem: Who invented Meccano in 1900?
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A:
frank hornby