Originally Posted by

**hana** Hello everyone,

I don't know much math,but I've been working on a few simple problems and here's one question that has been bothering me for awhile,

__Question:__

In 1970,I began collecting calendars and I have done so every year since.I will cease collecting when every subsequent year can be served by one,at least,of the calendars I have already collected.What is the last year in which I must collect the calendar ?

**(ans: 1996)**

I guess I should be looking for some sort of pattern here,but I just don't see one.

Should I be considering leap years here?

Erm...I really really don't know what I should do...

Hope someone can help.

Thank you.