Fill
in the matrix so that every row, every column, and every 3x3 box, contains the
numbers 1 through 9. This also means that no repetition of numbers is
allowed in each column, row, or 3X3 box.

Euclid of Alexandria was a Greek mathematician who
lived from about 365-300 B.C. Although little is known
about his early life, it is generally
believed that he studied under the students of Plato. He later established a school of mathematics and taught at the library in
Alexandria. His most prominent written work is
The Elements which is a collection of 13 books on Geometry. This
treatise contains 465 propositions, and dealt with several aspects of
plane and solid geometry. It was one of the most important recorded mathematical work in
the history of mathematics.