i dont get it at all

Answer:
4 is the answer.........
Explaination
CE=5
CD=1
DE=CE-CD
=5-1=4
Answer:
Im not sure whats its asking
Step-by-step explanation:
if its asking for d then i believe its 2 but if its asking for the ? then its 4
think of it having 7 as the number at the end, 4 would then be the most reasonable number to fit there based on the dot spacing