Nobody knows
You could say that there is no mode or that the data are amodal.
In math best
Black Math was created in 2003.
Latha Math was created in 2010.
Anand Math was created in 1952.
Math League was created in 1977.
Math for America was created in 2004.
Gaudiya Math was created in 1920.
Zentralblatt MATH was created in 1931.
Math Invaders was created in 1998.
Cheetah Math was created in 2007.
math was created when time began