Hello, thank you for taking the time to post your question!
In order to solve this type of question you want to start by dividing by 5 and then seeing how many are left
On this one that becomes
29/5 = 5 , remainder 4
So she’ll end up giving away 5 groups of 5 plants and will end up having 4 plants left over
I hope that helps get you moving in the right direction! Feel free to reach out if you have any additional questions beyond that :)