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Omni-MATH / Daniel wrote all the positive integers from 1 to n inclusive on a piece of paper. After careful observation, he realized that the sum of all the digits that he wrote was exactly 10…

Problem

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problem

Daniel wrote all the positive integers from 1 to nn inclusive on a piece of paper. After careful observation, he realized that the sum of all the digits that he wrote was exactly 10,000. Find nn.
Plain-text mathematical notation (without MathML)
Daniel wrote all the positive integers from 1 to n inclusive on a piece of paper. After careful observation, he realized that the sum of all the digits that he wrote was exactly 10,000. Find n.
Original LaTeX notation
Daniel wrote all the positive integers from 1 to $n$ inclusive on a piece of paper. After careful observation, he realized that the sum of all the digits that he wrote was exactly 10,000. Find $n$.

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Source and history

task_id
d44f0d17-fae4-5e7a-a0e7-f58310db1322
task_key
test--d44f0d17-fae4-5e7a-a0e7-f58310db1322
task_revision_id
1
config / split
/ test

Official source

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