Best short difficult riddles

cleanlogicwhat am Ipoems

I’m teary-eyed but never cry, silver-tongued, but never lie. double-winged, but never fly, air-cooled, but never dry. What am I?
Mercury. The element looks shiny, silver, and is wet. The god Mercury has two wings but only uses them to run.
71.12 %
153 votes
tricky

If there are four sheep, two dogs and one herds-men, how many feet are there?
Two. Sheep have hooves; dogs have paws; only people have feet.
71.07 %
78 votes
cleansimpleclever

Something very extraordinary happened on the 6th of May, 1978 at thirty-four minutes past twelve a.m. What was it?
At that moment, the time and day could be written as 12:34, 5/6/78.
71.05 %
86 votes