refactor: exercise model function

controllers/contentControllers/exercise.js

@@ -425,7 +425,14 @@ export const getExerciseByLevelIdForAdmin = async (req, res) => {
         { model: models.MatchingPairs, as: "matchingPairs" },
         { model: models.TrueFalse, as: "trueFalse" },
       ],
-      order: [["TITLE", "ASC"]],
+      order: [
+        [
+          models.Sequelize.literal(
+            "CAST(SUBSTRING_INDEX(TITLE, ' ', -1) AS UNSIGNED)"
+          ),
+          "ASC",
+        ],
+      ],
     });
 
     let formattedExercises = [];