Fatto matematico: 1948 is the number of 4×4 sliding puzzle positions that require exactly 10 moves to solve starting with the hole in a corner.
Trivia: 1948 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: May 1st is the day in 1933 that the Roca-Runciman Treaty between Argentina and Great Britain is signed by Julio Argentino Roca, Jr., and Sir Walter Runciman.