I'm taken from a mine, and shut up in a wooden case, from which I am never released. What am I?
Category: Brain Teasers · Difficulty: hard
Hint: Think of something used for writing that comes from the earth.
Answer
Graphite
Explanation
Pencil lead is made from graphite, which is mined, and it is encased in wood, never to be taken out.
This is a hard brain teasers riddle — a tricky one that takes a little thought. The answer is Graphite.
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