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MathNet 2016-part-02 — 184 problems (EN–VI) Question 100

Math Olympiad Vault · MathNet 2016-part-02 — 184 problems (EN–VI)

Question 100

Let $n$ be the smallest 4-digit positive integer greater than or equal to 2016 with the following property: there exists a positive integer $S$ such that

$$
S=\sqrt{a+\sqrt{b+\sqrt{c+\sqrt{d+S}}}}
$$

where $a, b, c, d$ are, in order, the thousands, hundreds, tens and units digits of $n$. What is the value of $n$?