13. Number 9 will shock you!
A lightbulb.
One to screw in the lightbulb, stock four carts of supplies, and handle seventeen simultaneous customers at any one time for five consecutive hours.
None it is done by the automatic pilot.
Two at most.
Because the only numbers in them are page numbers.
To crunch numbers.
Clickbait.
One, but it will take 13 attempts.
13\. Number 9 will shock you!
