diff --git a/src/Main.java b/src/Main.java
index 148a9e8..47f9e0b 100644
--- a/src/Main.java
+++ b/src/Main.java
@@ -4,7 +4,7 @@ public class Main {
     public static void main(String[] args) {
         // Press Alt+Eingabe with your caret at the highlighted text to see how
         // IntelliJ IDEA suggests fixing it.
-        System.out.printf("Hello and welcome!");
+        System.out.println("Hello and welcome!");
 
         // Press Umschalt+F10 or click the green arrow button in the gutter to run the code.
         for (int i = 1; i <= 5; i++) {
diff --git a/src/part3/aufg1.java b/src/part3/aufg1.java
new file mode 100644
index 0000000..b50a6e3
--- /dev/null
+++ b/src/part3/aufg1.java
@@ -0,0 +1,7 @@
+package part3;
+
+public class aufg1 {
+    public static void main(String[] args){
+        System.out.println("Hello World!");
+    }
+}
diff --git a/src/part3/aufg2.java b/src/part3/aufg2.java
new file mode 100644
index 0000000..81ad147
--- /dev/null
+++ b/src/part3/aufg2.java
@@ -0,0 +1,23 @@
+package part3;
+
+public class aufg2 {
+    public static void main(String[] args){
+        int a = 4;
+        int b = 2;
+        int c = 10;
+
+        System.out.println("Mittelwert aus a,b,c: " + (a+b+c)/3);
+        System.out.println("a < b < c: " + ((a < b) && (b < c)));
+        System.out.println("a = n * b: " + ((a % b) == 0));
+        System.out.println("2 Komplement c :" + ((~c) + 1));
+
+        c = Integer.MAX_VALUE;
+
+        System.out.println("Maximaler Int Wert: " + c);
+        System.out.println("Int.MAX + 1: " + (c + 1));
+
+        b = 0xFFFFFFFF;
+
+        System.out.println(b >>> 1);
+    }
+}
diff --git a/src/part3/aufg3.java b/src/part3/aufg3.java
new file mode 100644
index 0000000..eabaa4c
--- /dev/null
+++ b/src/part3/aufg3.java
@@ -0,0 +1,13 @@
+package part3;
+
+public class aufg3 {
+    public static void main(String[] args){
+        int a = 3;
+        int b = 4;
+        int c = 5;
+
+        boolean pythagoras_happy = (a*a +b*b == c*c);
+
+        System.out.println(pythagoras_happy);
+    }
+}