Fragen 4-6 für Kategorie Rechnen Level 4

src/main.c

@@ -524,14 +524,18 @@ int main()
     Question rechnenQst37= {.question = "8 - 3", .answer = "5"};
     Question rechnenQst38= {.question = "20 - 11", .answer = "9"};
     Question rechnenQst39= {.question = "15 - 7", .answer = "8"};
+    Question rechnenQst40= {.question = "25 - 18", .answer = "7"};
+    Question rechnenQst41= {.question = "9 - 5", .answer = "4"};
+    Question rechnenQst42= {.question = "40 - 28", .answer = "12"};
+
 
     Level rechnenlevel4 = 
     {
         .questions = 
         {
-             rechnenQst37, rechnenQst38, rechnenQst39, 
+             rechnenQst37, rechnenQst38, rechnenQst39,  rechnenQst40, rechnenQst41, rechnenQst42,
         },
-        .size = 3
+        .size = 6
     };