diff --git a/chapter01/worksheets/solution1.1.1.1_as_object_AR.scala b/chapter01/worksheets/solution1.1.1.1_as_object_AR.scala
new file mode 100644
index 0000000..53452e9
--- /dev/null
+++ b/chapter01/worksheets/solution1.1.1.1_as_object_AR.scala
@@ -0,0 +1,25 @@
+/** author: Andreas Röhler */
+
+/**
+  Factorial of 10
+  Find the product of integers from 1 to 10 (the factorial of 10).
+  */
+
+object MyFactorial {
+  def myFactorial(a: Int): Int = {
+    (1 to a).foldRight(1)(_ * _)
+  }
+  def main(args: Array[String]) {
+    val expected = 3628800
+    val result =  this.myFactorial(10)
+    println("result: %s".format(result))
+    assert(result == expected)
+  }
+}
+
+MyFactorial.main(Array())
+
+// scala> :load solution1.1.1.1_as_object_AR.scala
+// Loading solution1.1.1.1_as_object_AR.scala...
+// defined object MyFactorial
+// result: 3628800
diff --git a/chapter01/worksheets/solution1.1.1.1_function_AR.scala b/chapter01/worksheets/solution1.1.1.1_function_AR.scala
new file mode 100644
index 0000000..533fb1c
--- /dev/null
+++ b/chapter01/worksheets/solution1.1.1.1_function_AR.scala
@@ -0,0 +1,23 @@
+/** author: Andreas Röhler */
+
+/**
+  Factorial of 10
+  Find the product of integers from 1 to 10 (the factorial of 10).
+  */
+
+def myFactorial(a: Int): Int = {
+  (1 to a).foldRight(1)(_ * _)  
+}
+
+val result =  myFactorial(10)
+println("result: %s".format(result))
+
+val expected = 3628800
+assert(result == expected) 
+
+// scala> :load solution1.1.1.1_function_AR.scala
+// Loading solution1.1.1.1_function_AR.scala...
+// myFactorial: (a: Int)Int
+// result: Int = 3628800
+// result: 3628800
+// expected: Int = 3628800