Date magic square

A date magic square is a 4×4 magic square in which the numbers in a given date (for example 22–10–1887) are used to construct the first row (22, 10, 18, 87). The magic constant of a 4×4 magic square is 34. So, if the 4 numbers in a date don't add up to 34, we cannot construct a proper date magic square for that date. Example: 01–01–2004.

The only difference between a magic square and a date magic square is that, in a date magic square repetition of numbers is not allowed in any row except the first one, where as in a magic square no repetition of numbers is allowed in any of the rows.

Construction

References

• "Date Magic Square" by P. K. Srinivasan