Problem: In 800AD, who became the first Holy Roman Emperor?
Answer: charlemagne

Problem: """When shall we three meet again"" is the first line of which play?"
Answer: macbeth

Problem: Used in mathematics, the US term 'slipstick' is better known as what in the UK
Answer: slide rule

Problem: Dean Martin starred in 4 films as which fictional US government counter-agent, created by Donald Hamilton?
Answer:
matt helm