For snarky answers to generic interview questions

TODO:

http://programmers.stackexchange.com/questions/68980/interesting-variations-of-fizzbuzz
https://sites.google.com/site/steveyegge2/five-essential-phone-screen-questions
http://en.wikipedia.org/wiki/Fizz_buzz#Variations

Find common characters in a string

large array of numbers that can repeat and are not sorted
find first pair of numbers that sums to given integer