The State Examinations Commission has apologised to maths students for distress and confusion caused by sitting error-ridden exam papers.
The commission has also admitted a previously unknown issue with the Irish language version of the Junior Cert higher level maths paper.
It brings to four the total number of mistakes it says were present across various papers.
The phrase 'even number' was incorrectly translated as 'whole number' in the paper.
In a new statement tonight, the SEC says the errors were regrettable.
It says that while it aspires to an error-free system, this will always be an aspiration rather than a completely achievable goal.
The commission has restated that no student will be disadvantaged as a result of any of the errors and the marking schemes will take them into account.
The SEC has also clarified how many students were sitting each affected paper, with 15,132 taking Leaving Cert higher level maths paper two, 1,276 taking Leaving Cert ordinary level maths paper one, 2,441 taking Leaving Cert foundation level maths paper one and 1,500 taking Junior Cert higher level maths paper one.