As said in the title, this is a nice little routine. It's a math-based thing, but the premise &
patter are well designed to mask that. It needs no props except the spectator's phone that is never
toughed by the mentalist.
This is easy to learn, but I'd reccommend learning all the
nuances because they are very well thought out and change a cute little trick into something really
cool.
For a person who like being able to to a few miracles with little or nothing to
carry, this fits the bill.