Answer:
3 wholes
Explanation:
you can draw 6 circles and fill each circle with a number inside until you reach 20, I did that and had 3 wholes in each circle and two numbers left aside because two circles would be more than the rest. You can also do 20/6 or 20 รท 6 and you will get 3.333... But the point is that there will be 3 wholes in 20/6
lol sorry for the long explanation, hope you have a good day/night :))