Exam leaked online
An investigation is underway into an exam leaked in the UK.
It's after maths A-level papers were leaked online again
Answers to the exams were then posted across social media.
It's the third year in a row it has happened.
Pictures of an Edexcel paper appeared shortly before the test was sat by students on Friday.
Edexcel's parent company Pearson said it had taken action to identify the source of the leak.
