Count On

Explorer

A trick with a calendar

JANUARY 2000
Mo Tu We Th Fr Sa Su
  1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31  

On any calendar choose a particular month.

Here are the calendars for 1999, 2000 and 2001.

Let's choose January 2000 for example.

Now choose 4 dates that form a square (with no gaps)
such as 12, 13, 19 and 20.
Add up your four dates:
in this example we have 12+13+19+20 which is 64.
If you do this for any 4 dates in any month I'll tell you which 4 dates you picked.

Go on - try it! Put your total here:



The numbers you picked were:

How does it work?

Have a look at this page by Cynthia Lanius.
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Patterns