Burt Kaliski Jr. (@modulomathy) 3/25/12 10:28 AM #math trivia for #March25: #85 is 55 base 16. How many “two of a kinds” base 16 in a leap year? (Compare #66.) “Two of a kind” means that two of the digits are the same, base 16. This happens 15 times from 11 to ff base 16, … Continue reading →