If you love longing old mathematics, you must enjoy my collections. Friday afternoon mathematics. In order to enjoy mathemusement, we encounter some problem what kind of knowledge of mathematics is required. To understand some mathemusement, an elementary arithmetics would be enough. Some mathemusement requires us to have university level of mathematics.
Numbers equal their squares.
Magic Cubes of prime orders. Hyper Magic Cubes. Here are my several works around the magic of the numbers.