Question: To find a stud inside a wall without a detector.
Options:
Hit the wall gently with a hammer or other blunt object. A stud will make a different sound than hollow wall.
Hit the wall gently with a cat's paw or other sharp object. A stud will make a different sound than hollow wall.
Answer: Hit the wall gently with a hammer or other blunt object. A stud will make a different sound than hollow wall.