Problem: The British Assured Food Standards scheme for food and farm quality is represented in its branding and website name by a?
Answer: red tractor

Problem: Which arteries supply the head and neck with oxygenated blood?
Answer: carotid

Problem: Who emigrated to the USA in 1842, opened a detective agency in Chicago in 1861, and organised the US Secret Service?
Answer: allan pinkerton

Problem: Which was the second country to adopt postage stamps?
Answer:
brazil