Riddle

Six glasses (3 full, 3 empty). Move only one to make them alternate.

Choose an answer

A.Clock arithmetic
B.A calculator error
C.Daylight savings
D.Pour glass #2 into glass #5
Hint: It's a 4-word phrase with 18 letters, starting with "P".

Answer

Pour glass #2 into glass #5

Why this is the answer

This is a lateral thinking puzzle where the solution relies on a non-obvious interpretation of the words used.

This riddle is filed under Expert Riddles for Adults and rated Hard.