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Solution to the modulo 5^n riddle
Introduction
Orna Agmon Ben-Yehuda asked this riddle on her blog back in 1 December, 2009. Here is my solution to it.
If you like this site, I would appreciate a gift from my wishlist.
Orna Agmon Ben-Yehuda asked this riddle on her blog back in 1 December, 2009. Here is my solution to it.