How many words are there using these specific combinations of letters? 4!
With that start with 'out' and end with 'x', what is the longest word that you could assemble? outflux contains 7 letters, and is the longest word that's possible to make from the searched for combination.
What's the highest score you can get in Scrabble from this list of words that start with 'out' and end with 'x'? Your only feasible option is outjinx which totals 21 points.