Insight · ★☆☆☆☆ · ~2 min
The Six Glasses
Six glasses in a row, half full, half empty. Fix the pattern by touching just one.
by MindYourPuzzle
Six glasses stand in a row. Glasses 1, 2 and 3 are full of water; glasses 4, 5 and 6 are empty.
Touching only ONE glass, make the row alternate: full, empty, full, empty, full, empty.
How?
Hints