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MATH / How many of the natural numbers from 1 to 800, inclusive, contain the digit 6 at least twice? (The numbers 266 and 663 are two natural numbers that contain the digit 6 at least twi… · Discussion

Discussing How many of the natural numbers from 1 to 800, inclusive, contain the digit 6 at least twice? (The numbers 266 and 663 are two natural numbers that contain the digit 6 at least twi… · MATH

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