In a room with no windows, how can you tell what time it is using only shadows?
Category: Brain · Difficulty: hard
Hint: Think about how shadows can indicate direction and time.
Answer
Use a light source to cast shadows
Explanation
By using a light source, you can create shadows that shift according to the time of day, indicating the hour.
This is a hard brain riddle — a tricky one that takes a little thought. The answer is Use a light source to cast shadows.
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