diff --git a/A13/1.+Congratulations+in+C.c.bak b/A13/1.+Congratulations+in+C.c.bak
deleted file mode 100644
index 3585e4c..0000000
--- a/A13/1.+Congratulations+in+C.c.bak
+++ /dev/null
@@ -1,16 +0,0 @@
-//Made by Vlad. Budnitski.
-//AlphaTech - Programming Course.
-
-#include <stdio.h>
-#include <stdlib.h>
-
-int main()
-{
-    int grade;
-    scanf("%d", &grade);
-    if (grade >= 60)
-        printf("Congratulations! \n");
-    else
-        printf("Failed.. Try again \n");
-    return 0;
-}
diff --git a/A13/2.+Finding+Maximum+between+2+numbers.c b/A13/2.+Finding+Maximum+between+2+numbers.c
deleted file mode 100644
index 85a5e7e..0000000
--- a/A13/2.+Finding+Maximum+between+2+numbers.c
+++ /dev/null
@@ -1,17 +0,0 @@
-//Made by Vlad. Budnitski.
-//AlphaTech - Programming Course.
-
-#include <stdio.h>
-#include <stdlib.h>
-int main()
-{
-	int num1, num2;
-	printf("Enter two numbers:\n");
-	scanf("%d", &num1);
-	scanf("%d", &num2);
-	if (num1 > num2)
-		printf("max = %d\n", num1);
-	else
-		printf("max %d\n", num2);
-	return 0;
-}
\ No newline at end of file
diff --git a/A13/congrat.c.bak b/A13/congrat.c.bak
deleted file mode 100644
index a09dfcc..0000000
--- a/A13/congrat.c.bak
+++ /dev/null
@@ -1,23 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-
-int main()
-{
-    int grade;
-
-    printf("\nBitte geben Sie einen Wert ein: ");
-    scanf("%d", &grade);
-    printf("\n");
-
-    if (grade >= 60)
-    {
-        printf("Congratulations!\n");
-    }
-    else
-    {
-        printf("Sorry, you have failed .. Try again.\n");
-    }
-    printf("\n");
-
-    return 0;
-}
\ No newline at end of file