math summer hw

math.rb

lcm = 1.lcm(2).lcm(3).lcm(4).lcm(6).lcm(7).lcm(8).lcm(9)

def check(num)
  s = num.to_s
  if s.include? "5"
    return false
  end

  [1,2,3,4,6,7,8,9].each do |i|
    if ! s.include? i.to_s
      return false
    end
  end
  true
end

(1..100000000).each do |i|
  if check(lcm * i)
    puts lcm * i
    break
  end
end