16 Jun
2011
16 Jun
'11
12:27 p.m.
A3: Century
years are not leap years even though divisible by 4, unless
divisible by 400 (..the arcane things one remembers).
As a "Computer Math" problem, I gave different levels of credit for the
answers on whether they took 1900 into account, and whether they took 2000
into account.