हाउ मेनी 100 डिजिट पॉजिटिव नंबर्स आर देयर
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Step-by-step explanation:
There are nine ways to fill the first digit (1 to 9) and 10 ways to fill each of the other 99 digits (0 to 9). 9*10^99 (9 followed by 99 zeroes).
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