A recent Car Talk re-run on NPR had a nice, simple-to-state mathematical puzzler I’ll pass along if you missed it:
I hand you one thousand $1 bills and 10 separate envelopes.
Your chore is to put some number of those single bills into each envelope such that if someone asks you for any whole amount of money between $1 and a $1000 you are able to hand them a set of envelopes that, added together, constitute that exact sum of money!
How is the $1000 divided up among the 10 envelopes?
And for the answer, go to their site: