March 26, 2012
What is 4 times 5? What is 5 times 5? What is 25 times 4?
Find theses numbers on this project.
Stop at each of the places indicated and show me your numbers.
A pawl and ratchet lets "people" go only one way.
With this gearing how many "people" have been counted with one rotation of the indicator?
4
20
Move the indicator to the last.
100
The little gear has 8 teeth and the largest has 40.
See where the 5 comes from?
There are 4 arms on the turnstile.
See where the 20 comes from?
