palindrome.rb

class Fixnum
  def palindrome?
    to_s == to_s.reverse
  end
end

def parse_range line
  Range.new *line.split.map(&:to_i)
end

def count_palindromes file
  file.reduce(0) do |total, line|
    total + parse_range(line).count(&:palindrome?)
  end
end

p "Found #{count_palindromes File.open("seed.txt", "r")}"

# ruby-1.9.3

# $ time ruby palindrome.rb 
# "Found 106814"

# real  1m6.513s
# user  1m6.452s
# sys 0m0.020s