TODAY& #39;S #dailymaths CHALLENGE PROBLEM. Each day& #39;s problem (w/previous day& #39;s solution) is tweeted no later than 9am Eastern. Problems are from the Mathematics 2020 calendar. Guest solution posts welcome; DM if interested.

Yesterday& #39;s problem with solution by @pgeerkens. Thanks to resident puzzle master and provider of helpful hints in the #dailymaths -- you can always read more from @pgeerkens in the #dailymaths threads. Live link to the "more info" in the pic: https://en.wikipedia.org/wiki/Coin_problem">https://en.wikipedia.org/wiki/Coin...