When doubled, I become ten. My halves hint at limits, yet I am whole. What am I?

Category: Math · Difficulty: expert

Hint: Think about numerical values and operations.

Answer

A number five

Explanation

Doubling five gives ten. The halves of five are hinted as limits, but five stands alone.

This is a expert math riddle — one of the harder riddles here. The answer is A number five.

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