Go into your My Account page.

You will see a list of your registered courses. Each item in the list has a red chevron, click it.

This will cause that course in the list to expand out and you will see your course progress overview.

Within this overview you will see any assessments you have completed including your score and statistics.

Click the statistics icon. This will open a pop up with a breakdown of all your answers. From there you can see any questions you got wrong.