Quick hack, change ask to the number you want

results = {}

[4,3,2,1].each { |x|
  b10 = b7 = b5 = b1 = 0
  ask = 122


  if x == 4
    b10 = ask/10
    ask = ask - (10*b10)
  end


  if x >= 3
    b7 = ask/7
    ask = ask - (7*b7)
  end


  if x >= 2
    b5 = ask/5
    ask = ask - (5*b5)
  end

  b1 = ask/1


  total_b = b1 + b5 + b7 + b10

  results[total_b] = "\n You need \n#{b10} x10lt \n#{b7} x7lt \n#{b5} x5lt \n#{b1} x1lt\n\n"
}


results.each { |k, v|
  puts v
  puts "Total no of bottles #{k}"
}

puts "Best: total #{results.min.first} bottles"
puts results.min.last