Unlock Apple Game Center achievements, by completing the following tasks. I love this game!

Achievement	How to unlock
Experienced referee ( 75 points )	Answered over two hundred questions in total.
Hat trick! ( 50 points )	3 correct answers in a row.
Legend! ( 50 points )	20 in a row correct.
Man of the match ( 25 points )	Ten in a row correct.
Top referee ( 100 points )	Answered over two hundred questions correctly.
Who are ya? ( 25 points )	Less than fifty percent correct in assessment.