GCHQ sets fiendish quiz to mark launch of Alan Turing £50 note which could take SEVEN HOURS to solve
Spy harder: GCHQ sets fiendish quiz to mark the launch of Alan Turing £50 note… but experts say it could take you SEVEN HOURS to solve the riddle Britain’s spy centre GCHQ devised a quiz to celebrate the new Turing £50 note The note itself contains coded references to the mathematician and his life The … Read more