Certification tests your knowledge. A real code tests your recall under stress — and those are two very different things.
These 10 numbers are the ones that show up in every algorithm, every scenario, every debrief. Drill them until they're automatic. Cover the right column. Say each number out loud. Be wrong a few times. That's the only way they get into long-term memory.
"Knowing what to do and being able to do it under pressure are two different skills. One comes from reading. The other comes from repetition."
100–120
Chest compression rate
Compressions per minute. Too slow doesn't perfuse. Too fast doesn't refill. Stay in this range.