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2022 IIMC keystage2-EMIC team Question 4

xIMC · 2022 IIMC keystage2-EMIC team

Question 4

Select any positive integer $n$ and write down the integers from $0$ to $n$, inclusive, in some order with no spaces.

What is the minimum value of $n$ for which the resulting string can have the same value when read forwards and backwards? What is the resulting string?

The minimum value of $n$ is ______.

One such resulting string is ______.