Wednesday, September 24, 2008

Going Up/Down

Here is a fun one to chew on.

Escalator Problem
Adrian is at the top of descending escalator, and his son Brad is at the bottom.
Adrian starts walking down the escalator, and counts 40 steps when he reaches the bottom. Brad starts running up the escalator, at three times the speed his father is walking down, and counts 72 steps when he reaches the top.
How many steps are visible when the escalator is stopped?

Post your answer when you get it. First correct answer gets 50 units of geek cred.


Anonymous said...

I say 64.

Unknown said...


How did you get 64? This problem has been driving me crazy. I don't want to look at the answer until I feel like we really have something. Can you explain your logic?