Brain Teasers Trivia Mentalrobics
Optimized for Wii (visit full site)

Sum-day Soon

Math brain teasers require computations to solve.


Fun:*** (2.99)
Difficulty:*** (2.23)
Submitted By:hottiexo247


Some people believe that January 1, 2000 is the first day of the 21st century. Other people believe that the honor belongs to January 1, 2001. But everyone should agree that January 1, 2002 is the first "sum-day" of the new century- when you write out that date in standard notation, it becomes 01/01/02, and 1+1=2. More generally, a sum-day is a date in which the day and month add up to the year. With that in mind:

A) What is the last sum-day of the 21st century?

B) How many sum-days are there in the 21st century?

Show Answer

Rate Brain Teaser

If you become a registered user you can vote on brain teasers.




Back to Top

Copyright © 1999-2007 | Green | Privacy | Conditions
You are using the TV formatted version of Braingle. For more functionality, please visit the Full Website.

Sign In