diff --git a/src/Quiz/quiz.schema.ts b/src/Quiz/quiz.schema.ts
index 269487a..dc30086 100644
--- a/src/Quiz/quiz.schema.ts
+++ b/src/Quiz/quiz.schema.ts
@@ -1,5 +1,5 @@
 import crypto from 'crypto'
-import { Inject, Injectable } from '@nestjs/common'
+import { Inject, Injectable, Logger } from '@nestjs/common'
 import { AnswerType, Role } from '@prisma/client'
 import { QuestionType } from '@prisma/client'
 import { Pothos, PothosRef, PothosSchema, SchemaBuilderToken } from '@smatch-corp/nestjs-pothos'
@@ -195,8 +195,12 @@ export class QuizSchema extends PothosSchema {
               },
             })
             // get amount of questions using nrOfQuestions and random index based on random
-            const randomIndex = Math.floor(random * (quizzes[0]?.nrOfQuestions ?? 1))
-            return quizzes.slice(randomIndex, randomIndex + (quizzes[0]?.nrOfQuestions ?? 1))
+            const randomIndex = quizzes.length > 0 
+              ? Math.floor(random * quizzes.length) 
+              : 0
+            const nrOfQuestions = quizzes[0]?.nrOfQuestions ?? 1
+            const result = quizzes.slice(randomIndex, randomIndex + nrOfQuestions)
+            return result
           }
 
           // use case 2: center mentor or center owner