Talk:Zacharias Dase

Subitizing?
I must have read about Dase from the Gödel, Escher, Bach book; I've always been impressed. I'm led to believe that the skill described as an "uncanny sense of quantity" is what I just read about, a process called subitizing. 70.247.160.102 (talk) 06:08, 21 February 2010 (UTC)

Pi
This page says that he didn't calculate pi mentally. This is a common assumption. http://www.mentalcalculation.com/calculators/Johann_Dase.htm — Preceding unsigned comment added by 81.178.22.82 (talk) 14:40, 12 July 2011 (UTC)