No information on their ages. They were to live forever, therefore age was not a concept to them. It was only after they sin, that man begin to count or number his age.
In the bible story, is there any info about how old in age both Adam & Eve were when they first appeared in the garden of Eden?
They were full grown. They did not go through the baby process. Notice Adam's reaction when he first met Eve. Gen 2:23 "This is at last bone of my bones, And flesh of my flesh. This one will be call Woman, because from man she was taken."
They were not babies but full grown adults
Well with bible logic, ageing is a result of dying and since they hadn't sinned yet they were just humans they weren't any particular age.
I don't know if the bible tells there age.
