I found logic problems using a hundred chart at
www.mathwire.com. They have lots of ideas for all levels. I tried to attach them but the files are too large, sorry. Excellent site!!!!
Hopefully someone finds them useful.
You could also do predictions: how long would it take to do certain things 100 times, how far would 100 of something go, ...
Creative writing: what will things be like in 100 years