Putnam 1998 B5

Session B

Let $N$ be the positive integer with 1998 decimal digits, all of them 1; that is, $N=1111\cdots 11.$ Find the thousandth digit after the decimal point of $\sqrt N$ .

Curated text Kedlaya Putnam archive. Quoted with source.

Solutions

Human solution Solution 1 by Manjul Bhargava, Kiran Kedlaya and Lenny Ng

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