


Challenge 


Digit:
The symbols used to write numerals. 
Hot Stuff: If you are in Georgia, it should be easy to find the fraction and decimal that says, "I am hot."
Fractional Forms of Repeating Decimals: Use a system of equations to determine the fractional form of a repeating decimal.
The Last Digit: Given a number raised to a large power, find the one's digit of the expansion.
Cryptorithms: Translate letters into numbers.


