diff --git a/systeme/tp/revision/max.sh b/systeme/tp/revision/max.sh
new file mode 100755
index 0000000..2453b01
--- /dev/null
+++ b/systeme/tp/revision/max.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+pg=0
+
+for i; do
+	if [ $pg -lt $i ]; then
+		pg=$i
+	fi
+done
+if [ $pg -eq 0 ];then
+	echo "Pb, le plus grand est null" >&2
+	exit 1
+fi
+echo "$pg"
diff --git a/systeme/tp/revision/moyenne.sh b/systeme/tp/revision/moyenne.sh
new file mode 100755
index 0000000..6367a8c
--- /dev/null
+++ b/systeme/tp/revision/moyenne.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+som=0
+nb=0
+
+
+for i; do
+	som=$(($som + $i))
+	nb=$(($nb + 1))
+done
+moy=$(($som/$nb))
+echo "$moy"