I didn't think the physical capability test was too difficult. You use an isokinetic machine and kick as hard as you can against resistance and then pull up and down as hard as you can against resistance with your arm extended. The machine automatically adjusts how much resistance it gives you based on how hard you are pulling, so the test itself never seems "easy". However, I passed without an issue, as I'm sure most people do.
The med math test was very basic. I found it to be MUCH easier than any of the dosage tests I had in nursing school
The PBDS was more difficult. It has a couple sections. The first section had you rate certain scenarios as something you would need to take care of immediately, something you should do by the end of your shift, or something you could leave for the next shift, and then give your reasoning. The second section focused on startling comments patients or coworkers would say to you and you have to type back what your response would be to the comments. The third section gave 14 different short videos of patients. For each patient, you had to "diagnose" what you think their main medical issue is and then say what interventions you would do and give rationales for each. Most of them were complications and no longer stable patients. This section really focused on critical thinking.
I hope that answers your questions! Let me know if anything is unclear.