I can be added or subtracted, but I never change my nature. I can lead to solutions but remain elusive. What am I?
Category: Math · Difficulty: hard
Hint: Consider what you often solve for in equations.
Answer
An unknown
Explanation
An unknown represents a value that is not specified but can be determined through calculations.
This is a hard math riddle — a tricky one that takes a little thought. The answer is An unknown.
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