diff --git a/app.py b/app.py
index 1d07c37..3b66c51 100644
--- a/app.py
+++ b/app.py
@@ -1565,7 +1565,7 @@ def get_custom_level():
                 response["exercises"]["exercise_" + str(i)]["questions"].extend(
                     gen_multiple_choice_blank_space_utas(qty, exercise_id,
                     response["exercises"]["exercise_" + str(i)]["questions"])["questions"])
-                exercise_id = exercise_id + exercise_qty
+                exercise_id = exercise_id + qty
                 exercise_qty = exercise_qty - qty
 
         elif exercise_type == CustomLevelExerciseTypes.MULTIPLE_CHOICE_UNDERLINED.value:
@@ -1581,7 +1581,7 @@ def get_custom_level():
                 response["exercises"]["exercise_" + str(i)]["questions"].extend(
                     gen_multiple_choice_underlined_utas(qty, exercise_id,
                     response["exercises"]["exercise_" + str(i)]["questions"])["questions"])
-                exercise_id = exercise_id + exercise_qty
+                exercise_id = exercise_id + qty
                 exercise_qty = exercise_qty - qty
 
         elif exercise_type == CustomLevelExerciseTypes.BLANK_SPACE_TEXT.value: