Burt Kaliski Jr. (@modulomathy) 3/29/12 7:10 PM #math trivia for #March29: #89 can be constructed from the numbers 8 and 9 with + and * operations. How? What if you also had – and / ? With just addition and multiplication, the simplest construction is 89 = 8*9 + 8 + 9. A longer form … Continue reading →