Mock mock mock results

Got our Mock Exam papers back today. Pn Shirley said she'll return the paper tomorrow. Somehow, I don't understand. How come our school 75% get an A while other schools get an A for 80%? St Joe is 85% and above then got an A.
Anyway, I got 6A's(excluded my english paper). The results shock me.Really.
My aunt promised me that if I got 7A's for my mock, she will bring me to JAPAN. I don't think my father will allow. But, who knows. Maybe he changed his mind at the last minute. Hehe...