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Written terminating as it does, it is a rational number.

If that is the first bit with the 6 repeating forever (1.666...), then it is still a rational number.

Irrational Numbers as those numbers in decimal format that neither terminate nor end with a repeating sequence of digits.

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If it ends there, no, it's rational.If it continues with "666..." indefinitely, it isn't irrational either. Irrational numbers have no endlessly repeating pattern.

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Q: Is 1.6666 a irrational number
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