All of the above just took that test
The ability to lift a weight 12 times or more is not optimal for growing muscle mass. If you can't lift a weight eight or more times you are also not optimally building muscle mass. Generally speaking, the target goal for lifting weights to build muscle is anywhere between eight and 12 reps.
If each have 12 including their selves that would be 13. 13 times 2 is 26 -2 is 24 if your including the parter then it would be 25 not including your self
In some cases yes. Kids tend to learn faster than the average toddler.