Please don't post problems (by starting a topic) in the "X: Solved" forums. Those forums are only for showcasing the problems for the convenience of the users. You can always post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
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Abdullah Al Tanzim wrote: ↑
Wed Jun 21, 2017 5:42 pm
I think the problem can be solved in this way---
Then by solving this equation,I think the answer is 72
I think the value of $k=20$.
This is also Mymensingh regional 2017 problem 9
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\(k=3, m=2, n=1\) works
\(k=5, m=3, n=2\) works .