I am universal yet unseen, found in circles and more. What am I?
Category: Math · Difficulty: expert
Hint: Think about the relationship of a circle's circumference to its diameter.
Answer
A mathematical pi
Explanation
The mathematical pi is a constant that represents the ratio of a circle's circumference to its diameter.
This is a expert math riddle — one of the harder riddles here. The answer is A mathematical pi.
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