Solve this multiple-choice question and choose the correct option.

Data Sufficiency — Calendar: Find the date of the last Sunday of March 2006. Statement I: The first Sunday of that month fell on 5th March 2006. Statement II: The last day of March 2006 was a Friday. Decide which statements are sufficient to answer the question. Choose the correct sufficiency option.

Difficulty: Easy

Statement I alone is sufficient, but Statement II alone is not sufficient.
Statement II alone is sufficient, but Statement I alone is not sufficient.
Both statements I and II together are sufficient, but neither alone is sufficient.
Either statement I or statement II alone is sufficient.
Even both statements I and II together are not sufficient.

Correct Answer: Either statement I or statement II alone is sufficient.

Explanation:

Using Statement IIf the first Sunday is on 5th March, Sundays are 5, 12, 19, 26 ⇒ last Sunday = 26th.

Using Statement IIIf 31st March 2006 is Friday, then 26th is Sunday (counting backward): 31(Fri), 30(Thu), 29(Wed), 28(Tue), 27(Mon), 26(Sun).

ConclusionEach statement alone leads to the unique answer (26th March 2006).