I am a sequence that never ends, yet I can be used to calculate the unknown. What am I?
Category: Knowledge · Difficulty: hard
Hint: I am often involved in circles.
Answer
Pi value
Explanation
Pi (π) is an irrational number representing the ratio of a circle's circumference to its diameter and is infinite.
This is a hard knowledge riddle — a tricky one that takes a little thought. The answer is Pi value.
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