diff --git a/src/main/c/Calculator/calculator.c b/src/main/c/Calculator/calculator.c
index 7616c8b..40c1b42 100644
--- a/src/main/c/Calculator/calculator.c
+++ b/src/main/c/Calculator/calculator.c
@@ -174,7 +174,15 @@ void displayMenu() {
     printf("9. Square Root\n");
     printf("10. Square\n");
     printf("11. Cube\n");
-    
+    printf("12. Cube Root\n");
+    printf("13. Factorial\n");
+    printf("14. Power\n");
+    printf("15. Sine\n");
+    printf("16. Cosine\n");
+    printf("17. Tangent\n");
+    printf("18. Permutation\n");
+    printf("19. Combination\n");
+    printf("20. Exit\n");
 }
 int add(int num1, int num2) {
     return num1 + num2;