Arithmetic Aptitude :: Calendar

It was Sunday on Jan 1, 2006. What was the day of the week Jan 1, 2010?

If 6^{th} March, 2005 is Monday, what was the day of the week on 6^{th} March, 2004?

On what dates of April, 2001 did Wednesday fall?

On 8^{th} Feb, 2005 it was Tuesday. What was the day of the week on 8^{th} Feb, 2004?