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17

Part of 2021 Malaysia IMONST 1

Problems(1)

6n+1 written in base 10 has all digits equal 2021 Malaysia IMONST 1 Senior P17

Source:

9/22/2021
Determine the sum of all positive integers nn that satisfy the following condition: when 6n+16n + 1 is written in base 1010, all its digits are equal.
number theoryDigits