This section started on April 1, 1996.
Choose "Odd Year" or "Even Year" below. After you submit your decision to each problem, a message "Next one, please!" will be returned at the top and bottom of your screen. The next problem will be shown by clicking this message.
Is your birth-year (the year in which you were born) is an Odd year or an Even year?
Odd Year Even Year
For example, the birth-year 1964 is an Even year.
Copyright © 1996 by Jiro Ihara