I the most stupiest ppl in the world

memang...I get my maths paper.I get 65.As long its a i am just happy.But when i check my answer and question.I found out that 5 question which i know how to do and i got the correct answer.BUT!!!! I mark the wrong answer at the answer sheet.It was so stupid.1 question 2mark.I was like WTF?..Lucky just intervensi.I swear i won't do that mistake again!