A FizzBuzz-styled programming question for a job application.

fizzbuzz.rb

def fizzbuzz
  fifteens = temp = 0
  0.upto(1000).collect do |x|
    fifteens += x if x % 15 == 0
    temp += x if ((x % 3 == 0) ^ (x % 5 == 0))
  end
  puts "Single fifteens: #{temp + fifteens}"
  puts "Double fifteens: #{temp + (fifteens * 2)}"
end

fizzbuzz 
"Single fifteens: 234168"
"Double fifteens: 267333"