Another fizzbuzz kata solution with improved readability and OO design

fizzbuzz3.rb

class FizzBuzzGame
  FIZZ = 'fizz'
  BUZZ = 'buzz'
  FIZZBUZZ = 'fizzbuzz'

  def answer_for(number)
    return FIZZBUZZ if number.divisible_by_3? and number.divisible_by_5?
    return FIZZ if number.divisible_by_3?
    return BUZZ if number.divisible_by_5?
    number.value
  end
end

class FizzBuzzNumber
  attr_reader :value

  def initialize(number)
    @value= number
  end

  def divisible_by_3?
    divisible_by?(3)
  end

  def divisible_by_5?
    divisible_by?(5)
  end

  private 
    def divisible_by?(divisor)
      @value % divisor == 0
    end
end