Only Half of PADI RDP exams are questions about calculating dive profiles! 50% of all exams are about General Rules and the Background of PADI Dive Tables.
If you can answer the very simple questions in this video, then you’ll easily get all 50% of any PADI Exam correct. The other 50% is easy! You just need to know how to use your planner.

There is another very useful video on Youtube making the subject of Compartments, Half Times and M Values very simple.

If you need any more help, please contact me to ask any questions on how I can help you prepare for your PADI IDC by taking our Distance Learning Preparation Course. This will get you right up to speed with both Theory and PADI Standards.