1. Given an input number n (say 100). print out all the numbers from 0 to n except replace the number with "fizz" if the number is divisible by 3, "buzz" if the number is divisible by 5 and "fizz-buzz" if divisible by both 

2. Find the sum of all the multiples of 3 or 5 below 1000 

3. Write a program to convert from arabic numerals to Roman numerals i.e. given 4, program should return "IV". Make it work for all numbers upto 1000.