Observe this:

The starting (first) digits of: $9^1=9 , 9^2=8 , 9^3=7 , 9^4=6 , 9^5=5.$ follows a certain pattern, isn't it?

Find the minimum natural power of 9 for its first digit to become 1

BONUS: Find the minimum power if the power was an integer

The answer is 16.

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Shouldn't the answer just be zero? 9 to the power 0 is 1, the first digit of which is 1.