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## Homework Statement

I was flicking through the newspaper the other day and noticed there is a type of puzzle where words are added together to form a sum.

Each letter represents one of the digits 0-9,

for example:

FUN

+JOKE

=HAHA

and the aim of the puzzle is to find which letters correspond to which digits

I was just wondering if there is any mathematical basis to solving this puzzle or whether trial and error is the only way to do these.

Cheers