A detective finds a note that vanishes when exposed to light. What was the note written with?
Category: Mystery · Difficulty: expert
Hint: Think of writing that hides in plain sight.
Answer
Invisible ink
Explanation
Invisible ink is designed to be invisible until revealed by a specific method, such as heat or UV light.
This is a expert mystery riddle — one of the harder riddles here. The answer is Invisible ink.
More Mystery riddles
- I am a keeper of mysteries, often locked away but crucial to understanding. What am I?
- I can come in many forms, sometimes gentle, sometimes demanding. I often lead to unexpected outcomes. What…
- I can look welcoming but hide dangers, my surface betrays no hint of peril, what am I that ensnares the…
- I obscure sight yet reveal new forms, I am not a barrier but a guide, what am I that cloaks the familiar?
- I can appear in dreams, yet I never sleep, holding the key to secrets waiting to be unearthed. What am I?
- I can demand attention without a sound, I exist in thoughts but cannot be grasped. What am I?
- I wear a face but hide my core, I change each time yet remain the same. What am I?
- I start with a question, yet I answer in silence. What am I?