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In a competition that i have recently taken part in, one of this questions popped out:
$2^{29}$ has nine distinct digits. Find the digit that is not in the sequence.
My answer will be placed as a 'Answer-your-question'.
However, my main question is: are there other methods?

1 Answers1

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Most people did the same as me:
Since closed to nothing would do. There was only one thing to do. SMACK the question with plain and good-ol' Brute-force.
From that, we now know that the answer is 4.