docs(quiz-app): add clearance in the readme

subjects/mobile-dev/quizz-app/README.md

@@ -7,8 +7,8 @@ You need to develop a fully functional [**stateful Quizz app**](https://docs.flu
 **Features:**
 
 - The app needs to feature at least 5 different categories that the users can select from the main page, i.e, history, culture, math, geography, etc.
-- The app needs to feature at least at least 10 questions to each `quizz`.
+- The app needs to feature at least 10 questions to each `quizz`, so you need to make sure each category has at least 10 questions as well.
-- Appropriate name and images must be added to all of the selected categories. (follow the examples bellow)
+- Appropriate name and images must be added to all the selected categories. (follow the examples bellow)
 - Upon selecting a category, the app needs to display the corresponding image to that category, along with the question and true/false buttons.
 - After the user answers the question, the app needs to display whether the answer was correct or incorrect.
 - At the end of the quiz, the user must be presented with a view of the score he got and a button to go back to the main page.