geoffalizer.rb

#!/usr/bin/env ruby

class Geoff
  def initialize(numeric = nil)
    numeric ||= 1
    @number = numeric.to_i
  end

  def to_s
    ["Geoff", title].join(" ")
  end

  private
  def title
    "the #{@number.ordinate}"
  end
end

class Integer
  def to_geoff
    Geoff.new(self)
  end

  def ordinate
    case self.to_s[-1,1]
    when "1"
      "#{self}st"
    when "2"
      "#{self}nd"
    when "3"
      "#{self}rd"
    else
      "#{self}th"
    end
  end
end

1.upto(10) do |generation|
  puts generation.to_geoff
end