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Following are the first 10 terms of the sequence of the 2016-digit numbers with all their digits repeating in ascending order;

0123456789012345678901234567890 123456789012345 0123456789012345678901234567890 \dots 123456789012345 123456789012345678901234567890 1234567890123456 123456789012345678901234567890 \dots 1234567890123456 23456789012345678901234567890 12345678901234567 23456789012345678901234567890 \dots 12345678901234567 3456789012345678901234567890 123456789012345678 3456789012345678901234567890 \dots 123456789012345678 456789012345678901234567890 1234567890123456789 456789012345678901234567890 \dots 1234567890123456789 56789012345678901234567890 12345678901234567890 56789012345678901234567890 \dots 12345678901234567890 6789012345678901234567890 123456789012345678901 6789012345678901234567890 \dots 123456789012345678901 789012345678901234567890 1234567890123456789012 789012345678901234567890 \dots 1234567890123456789012 89012345678901234567890 12345678901234567890123 89012345678901234567890 \dots 12345678901234567890123 9012345678901234567890 123456789012345678901234 9012345678901234567890 \dots 123456789012345678901234

What are the last 3 3 digits of the 229201 6 th 2292016^\text{th} term of the sequence?

Clarifications:

  • Considered the first one as a 2016-digit number as well, the number has one leading zero and then the pattern continues.
  • Each of the numbers has a repeating part 0123456789 \dots 0123456789 \dots

Try Part 2 of this problem as well.


The answer is 890.

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1 solution

Poca Poca
Jun 3, 2018

The sequence is periodic mod 10. Hence the 229201 6 th 2292016^\text{th} is equal to the 6 th 6^\text{th} term.

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