The State Examinations Commission says human error was the cause of mistakes in a number of Leaving Cert exams this year.
It's published a report on the incidents, which blames departmental cutbacks for the errors.
It also says the introduction of the Project Maths syllabus also contributed.
Richard Lanford from the S-E-C says the incidents were regrettable - particularly in the higher level Maths Paper 2 exam:
