13 April 2011
I hope you are asking about minimum age to write. The question here by seems to be age limit that can create a notion that there is any age bar.
If your quesion is with respect to age bar, there is no age bar.
However, if your question is with respect to minimum age to be completed to write CPT, I hope 16 to 17 years of age. How this i had worked out is for passing Metriculation at least 15 years and 2 more year required for passing Intermediate or plus 2 level exam.