1. Carrie Lam is Hong Kong’s new Chief Executive.
  2. Red is the colour that always appears on the outside edge of a rainbow.
  3. April Fool’s Day can be traced back to the reign of Charles 1 of France with the reform of the Gregorian calendar in 1582.
  4. Hecate is the chief witch in Macbeth.
  5. Swiss psychologist Carl Jung originated the concept of introvert and extrovert personalities.