Math sure can be hard.
Especially when it entails looking at one number, and then another, and thinking about the difference between them.
For instance, here’s the number “20” as seen on the jersey legendary Louisville basketball player who helped lead Denny Crum’s Cardinals to the 1986 national championship:

And here’s the “21,” as seen on the jersey of an Arkansas basketball guard set to take the court tonight when No. 25 Arkansas hosts No. 6 Louisville in the ACC/SEC Challenge.

Forget for a moment that the Razorback, DJ Wagner, is the grandson of the Cardinal, Milt Wagner.