Answer:
Step-by-step explanation: I would say 4. The reason is because when you list out all the numbers that are a multiple of them or get the Greatest common factor(GCF) what I call it.You will find that 4 will be the greatest of all of the multiples that are the same number fr all shelves.Now if you are talking about each one and not suppose to be the same number,then it will be 8=4 12=6 16=8
Please mark brainliest!!!!!!!!!!
