How many days are there from October 29, 2011 to April 16, 2012
one hundred and seventy
How many days are there from February 28, 2010 to April 11, 2012
774
How many days are there from May 12, 2011 to January 30, 2013?
629
This can be calculated as 30 days in 2013 and 366 days in 2012. It's a leap year
May 19, July, August, October, December are 31 days, June, September, November are 30 days, a total of 233 days
All in all, 629 days
Negative one negative two plus positive three positive four add to 2012 according to this rule