Problem: What part of the body would a cardiologist specialise in
Answer: heart

Problem: The novels 'The Shipmaster, 'The Iron Ships' and 'The Trade Winds' by Cyril Abraham, are based on which 1970's British tv series?
Answer: onedin line

Problem: The platypus and four species of which mammal are the only surviving monotremes?
Answer: echidna

Problem: What is the chemical formula for laughing gas (nitrous oxide)?
Answer:
n2o