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soopo
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Homework Statement
How can you convert 212 in base-10 to base-9?
The Attempt at a Solution
There are holes in the sequence of figures when considering 212 in base-9.
There are 21 holes in the line. There also holes from 90 to 99 and from 190 to 199.
There are then 40 (= 23+10+10-1) holes in the line, since 198 belongs to the previous sets already.
This suggests me that the figure in base-9 is at least 242.
However, the correct answer is 248.
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