Trivia: What do all the flags of the Scandinavian countries have in common?
They are blue
They have crosses
They have a crown
They are triangular
The correct answer is They have crosses
So why is this answer correct? : The flags of the Scandinavian countries use different colors and slightly different designs, but they all feature one thing in common: a Nordic cross. The cross — which is vertically oriented and stretched to all four corners of the flag — originated on banners that were once flown during war.