PUMaC 2009 · 数论（A 组） · 第 5 题

PUMaC 2009 — Number Theory (Division A) — Problem 5

Suppose that for some positive integer n , the first two digits of 5 and 2 are identical. Suppose the first two digits are a and b in this order. Find the two-digit number ab .

解析

暂无解答链接。

No solutions link available.