This is not the correct way to attempt the answers.
Please tell your siblings as well.
When you get question paper read carefully and give 5 minutes to read it then decide which question you can write very well
then start from that.
It will have good impression on the examiner.
No hurry at all in hurry you will always forget.
Always think that there is Inshallah plenty of time and you will finish in time.
Always start with the name of Allah Pak say Bismillah.