How many days from 13th October 2010 to 21st October 2012?

To find the number of days from 13th October 2010 to 21st October 2012, we calculate the total days across the years. From 13th October 2010 to 13th October 2012 is 2 years (or 730 days, considering 2012 is a leap year). We then add the additional days from 13th October 2012 to 21st October 2012, which is 8 days. Therefore, the total is 730 + 8 = 738 days.