Skip to content / Đến nội dung
ThichHocToan.com

MathNet 2026 — Part 01 Question 128

Math Olympiad Vault · MathNet 2026 — Part 01

Question 128

A strategy with a very large number - Carlos then wrote all the numbers from 1 to 60 : $$
1234567891011121314 \cdots 57585960
$$ then he scratched 100 digits so that the number formed with the numbers that were not scratched was the greatest possible, without changing the initial order of how the digits were written. what is this number?