diff --git a/programming/exercises/variables_types.tex b/programming/exercises/variables_types.tex
index acbd2cd..90658cf 100644
--- a/programming/exercises/variables_types.tex
+++ b/programming/exercises/variables_types.tex
@@ -1,4 +1,4 @@
-\documentclass[12pt,a4paper,pdftex]{exam}
+\documentclass[12pt,a4paper,pdftex, answers]{exam}
 
 \usepackage[german]{babel}
 \usepackage{natbib}
diff --git a/programming/exercises/vectors.tex b/programming/exercises/vectors.tex
index 2e5ca46..5c7d79c 100644
--- a/programming/exercises/vectors.tex
+++ b/programming/exercises/vectors.tex
@@ -1,4 +1,4 @@
-\documentclass[12pt,a4paper,pdftex]{exam}
+\documentclass[12pt,a4paper,pdftex, answers]{exam}
 
 \usepackage[german]{babel}
 \usepackage{natbib}