The last Sunday of March, 2006 fell on which date ?
I. The first Sunday of that month fell on 5th.
II. The last day of that month was Friday.
If the data either in statement I alone or in statement II alone are sufficient to answer the question
From I, we conclude that 5th, 12th, 19th and 26th of March, 2006 were Sundays. So, the last Sunday fell on 26th. From II, we conclude that 31st March, 2006 was Friday. Thus, 26th March, 2006 was the last Sunday of the month.