diff --git a/numbers.c b/numbers.c
index f59d9a2..9f33570 100644
--- a/numbers.c
+++ b/numbers.c
@@ -14,13 +14,91 @@
 // Returns len random numbers between 1 and 2x len in random order which are all different, except for two entries.
 // Returns NULL on errors. Use your implementation of the binary search tree to check for possible duplicates while
 // creating random numbers.
+
+//ohne Binärbaum
+/*unsigned int *createNumbers(unsigned int len)
+{
+  if (len <= 2)
+    return NULL;
+  
+  // Zufallszahlen erzeugen
+  srand(time(NULL));
+  unsigned int *numbers = malloc(len * sizeof(unsigned int));
+  //prüfen, ob Speicher richtig reserviert wurde
+  if(numbers == NULL){
+    printf("Es konnte nicht genügend Speicher reserviert werden");
+    free(numbers);
+    return NULL;
+  }
+  //einsetzen der Zahlen ins array
+  for (size_t i = 0; i < len; i++){
+    numbers[i] = (rand()%(2*len))+1;
+    //stellt sicher, dass keine Duplikate vorhanden sind
+    for(size_t j = 0; j < i; j++){
+      if(numbers[i] == numbers[j]){
+        i--;
+        break;
+      }
+    }
+
+  }
+  numbers[rand()% len] = (rand()% (2* len) )+ 1;
+  return numbers;
+  free(numbers);
+}*/
+
+int compare(const void *a, const void *b) {
+    return (*(int*)a - *(int*)b);
+}
+//mit Binärbaum
 unsigned int *createNumbers(unsigned int len)
 {
+  if (len <= 2)
+    return NULL;
+  
+  // Zufallszahlen erzeugen
+  srand(time(NULL));
+  unsigned int *numbers = malloc(len * sizeof(unsigned int));
+  //prüfen, ob Speicher richtig reserviert wurde
+  if(numbers == NULL){
+    printf("Es konnte nicht genügend Speicher reserviert werden");
+    free(numbers);
+    return NULL;
+  }
 
+  TreeNode *root = NULL;
+  for(size_t i= 0; i < len; i++){
+    unsigned int isDup = 0; 
+    numbers[i] = (rand()%(2*len))+1;
+    root = addToTree(root, &numbers, sizeof(numbers), compare, &isDup);
+    if(isDup != 1){
+      i--;
+    }
+  }
+
+  numbers[rand()% len] = (rand()% (2* len) + 1);
+  return numbers;
+  clearTree(root);
+  free(numbers);
 }
 
 // Returns only the only number in numbers which is present twice. Returns zero on errors.
 unsigned int getDuplicate(const unsigned int numbers[], unsigned int len)
 {
+  unsigned int dobble;
+  // neues Array zum reinkopieren initialisieren 
+  unsigned int *nums = malloc(len * sizeof(unsigned int));
+  for(int l = 0; l < len; l++)
+    nums[l] = numbers[l]; 
 
+  //array sortieren
+  qsort(nums, len, sizeof(unsigned int), compare);
+  for(int k = 0; k < len; k++){
+    if(nums[k] == nums[k+1]){
+      dobble = nums[k];
+      break;
+    }
+  }
+  return dobble;
+  free(nums);
 }
\ No newline at end of file
diff --git a/test_numbers.c b/test_numbers.c
new file mode 100644
index 0000000..eec9e60
--- /dev/null
+++ b/test_numbers.c
@@ -0,0 +1,54 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+#include "numbers.h"
+#include "bintree.h"
+#include "unity.h"
+
+//überprüft, dass die Funktion nicht NULL zurückgibt
+void test_create_Numbers_notNull(void){
+    unsigned int* numbers = createNumbers(10);
+    TEST_ASSERT_NOT_NULL(numbers);
+    free(numbers);
+}
+// überprüft, ob die generierten Zufallszahlen innerhalb des Intervalls sind
+void test_create_Numbers_randoms_inside_Value_range(void){
+    unsigned int len = 10;
+    unsigned int* numbers = createNumbers(len);
+
+    for(size_t i = 0; i < len; i++)
+        TEST_ASSERT_LESS_OR_EQUAL(2 * len + 1, numbers[i]);
+
+    free(numbers);
+}
+
+// überprüft, ob getDuplicate,die richtige doppelte Zahl findet
+void test_get_duplicate_returns_correct_dobble(void){
+    unsigned int numbers [5] = {1,2,3,4,2};
+    unsigned int len = 5;
+    unsigned int expected_result = 2;
+    unsigned int result = getDuplicate(numbers, len);
+    TEST_ASSERT_EQUAL_UINT32(expected_result, result);
+}
+
+
+void setUp(void) {
+    
+}
+
+void tearDown(void) {
+    
+}
+
+
+int main()
+{
+    UNITY_BEGIN();
+    
+    printf("\n============================\nNumbers tests\n============================\n");
+    RUN_TEST(test_get_duplicate_returns_correct_dobble);
+    RUN_TEST(test_create_Numbers_notNull);
+    RUN_TEST(test_create_Numbers_randoms_inside_Value_range);
+    return UNITY_END();
+}
\ No newline at end of file