Can you figure out the fewest number of marks needed on this ruler?
(I think this would be a great math task!)
(I think this would be a great math task!)
Comments
2 and 3 inch needs 3 marks
4, 5, and 6 inch 4 marks
7, 8, and 9 inch 5 marks
10, 11, 12 inch 6 marks
13 needs 7 and I stopped there
including a mark for zero
it looks to me like one extra mark every 3 inches
for 10 I used
01-34---8-¹0
I might spreadsheet some more