Maths is fun!
Today is the 21st day of the 21st year of the 21st century!
To celebrate here is a 21 by 21 magic square which has a magic total of 21.

Maths is fun!
Today is the 21st day of the 21st year of the 21st century!
To celebrate here is a 21 by 21 magic square which has a magic total of 21.
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