Finally a quiz for newbies like me. 
ARGV[0].to_i.upto(ARGV[1].to_i) do |x|
puts case [15,5,3].find {|i| x % i == 0}
when 15 : 'FizzBuzz'
when 5 : 'Buzz'
when 3 : 'Fizz'
when nil: x
end
end
Thanks a lot for the quizzes, I'm teaching myself ruby with them.
ps: Is it ok to send solutions of previous quizzes?