Mathematik Witz+Bild | 19, 28, 4, 7, 39 #2

"Herr Ober! Zahlen bitte!" —"19, 28, 4, 7, 39"
"Herr Ober! Zahlen bitte!" "19, 28, 4, 7, 39"
https://100xhahaha.com/pic!c5f198e6_sf.jpg