In another channel called 2d7182818, he/she has proposed six methods, concerning a math puzzle of changing 2718 2818 to 2009 in a mathematical way. It took me 9 minutes 33 seconds to come up with the 7th method and so I’d like to share with others.
Duration : 0:3:13
Technorati Tags: 2.7182818..., 2d7182818, Algebra, alphametics, arithmetic, backwards, crytarithm, log, Logarithm, math, mathematics, natural, problem, puzzle, shuxueyouxi, solving, strategies, working, zhihuiyouxi
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In another channel called 2d7182818, he/she has proposed six methods, concerning a math puzzle of changing 2718 2818 to 2009 in a mathematical way.
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