Elementary Math

Even from a young age, it was clear my aptitude was for math. Recently while browsing the bookstore, I picked up one of my favorite books from elementary school: Sideways Arithmetic from Wayside School by Louis Sachar. In this book, you learn to add and subtract words. For example:

 stays
+  say
------
 trust

In this problem, each letter represents a different digit and you solve for the digits. Now keep in mind that this book is written for elementary school children. I thought this was super awesome when I was young, and did this whole book non-stop, then picked up the sequel and completed it as well.

Here's another one:

 straw
x   to
------
 warts
straw 
------
chairs

If you know a mathematically inclined child, this book is a must for their library.