#math trivia for #September28: #271 is a permutation of digits 1, 2, 7. Which other day-numbers (1-365) are a permutation of these digits? — Burt Kaliski Jr. (@modulomathy) September 29, 2013 There are six possible permutations of any three distinct digits; in this case, the six possibilities are: 127 172 217 271 712 721 However, … Continue reading
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#math trivia solution: The five classes eat lunch at separate times …
#math trivia: The five classes eat lunch at separate times. Every day their times are in a different order. How long can this go on? — Burt Kaliski Jr. (@modulomathy) September 17, 2012 There are 5*4*3*2*1 = 120 different possible orders in which the five classes can eat lunch, so this can go on for … Continue reading
