Here a puzzle that appeared in a The Friday magazine of Gulf News recently:
Five people stood in the queue at the post office all facing forward along the line towards the counter. From his position in the queue, Alan could see both Mr. Irving and Mrs. Foster. Emma could see both Mr. Harris and Dave. From his position, Barry could see Mr. Jones, but not Celia. The surname of one of the people in the queue was Green.
So now reconstruct the queue.